NEWS
author bulwahn
Wed May 18 15:45:34 2011 +0200 (2011-05-18)
changeset 42843 0e594ba0b324
parent 42815 61668e617a3b
child 42874 f115492c7c8d
permissions -rw-r--r--
NEWS
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Isabelle NEWS -- history user-relevant changes
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==============================================
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New in this Isabelle version
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----------------------------
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*** General ***
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* Theory loader: source files are identified by content via SHA1
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digests.  Discontinued former path/modtime identification and optional
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ISABELLE_FILE_IDENT plugin scripts.
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* Parallelization of nested Isar proofs is subject to
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Goal.parallel_proofs_threshold (default 100).  See also isabelle
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usedir option -Q.
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* Discontinued support for Poly/ML 5.2, which was the last version
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without proper multithreading and TimeLimit implementation.
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* Discontinued old lib/scripts/polyml-platform, which has been
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obsolete since Isabelle2009-2.
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* Theory loader: source files are exclusively located via the master
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directory of each theory node (where the .thy file itself resides).
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The global load path (such as src/HOL/Library) is has been
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discontinued.  INCOMPATIBILITY.
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* Various optional external tools are referenced more robustly and
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uniformly by explicit Isabelle settings as follows:
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  ISABELLE_CSDP   (formerly CSDP_EXE)
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  ISABELLE_GHC    (formerly EXEC_GHC or GHC_PATH)
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  ISABELLE_OCAML  (formerly EXEC_OCAML)
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  ISABELLE_SWIPL  (formerly EXEC_SWIPL)
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  ISABELLE_YAP    (formerly EXEC_YAP)
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Note that automated detection from the file-system or search path has
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been discontinued.  INCOMPATIBILITY.
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* Name space: former unsynchronized references are now proper
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configuration options, with more conventional names:
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  long_names   ~> names_long
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  short_names  ~> names_short
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  unique_names ~> names_unique
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Minor INCOMPATIBILITY, need to declare options in context like this:
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  declare [[names_unique = false]]
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* Literal facts `prop` may contain dummy patterns, e.g. `_ = _`.  Note
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that the result needs to be unique, which means fact specifications
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may have to be refined after enriching a proof context.
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* Isabelle/Isar reference manual provides more formal references in
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syntax diagrams.
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*** HOL ***
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* Code generation:
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  - theory Library/Code_Char_ord provides native ordering of characters
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    in the target language.
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* Declare ext [intro] by default.  Rare INCOMPATIBILITY.
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* Finite_Set.thy: locale fun_left_comm uses point-free characterisation;
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interpretation proofs may need adjustment.  INCOMPATIBILITY.
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* Nitpick:
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  - Added "need" and "total_consts" options.
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  - Reintroduced "show_skolems" option by popular demand.
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  - Renamed attribute: nitpick_def ~> nitpick_unfold.
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    INCOMPATIBILITY.
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* Sledgehammer:
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  - sledgehammer available_provers ~> sledgehammer supported_provers
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    INCOMPATIBILITY.
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  - Added support for SNARK and ToFoF-E on SystemOnTPTP and for simply typed
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    TPTP problems (TFF).
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  - Added "type_sys", "max_mono_iters", and "max_new_mono_instances" options.
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* "try":
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  - Added "simp:", "intro:", and "elim:" options.
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* Quickcheck:
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  - Added "eval" option to evaluate terms for the found counterexample
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    (currently only supported by the default (exhaustive) tester)
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  - Added post-processing of terms to obtain readable counterexamples
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    (currently only supported by the default (exhaustive) tester)
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* Function package: discontinued option "tailrec".
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INCOMPATIBILITY. Use partial_function instead.
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* HOL-Probability:
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  - Caratheodory's extension lemma is now proved for ring_of_sets.
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  - Infinite products of probability measures are now available.
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  - Use extended reals instead of positive extended reals.
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    INCOMPATIBILITY.
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*** Document preparation ***
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* Antiquotation @{rail} layouts railroad syntax diagrams, see also
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isar-ref manual.
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* Localized \isabellestyle switch can be used within blocks or groups
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like this:
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  \isabellestyle{it}  %preferred default
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  {\isabellestylett @{text "typewriter stuff"}}
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* New term style "isub" as ad-hoc conversion of variables x1, y23 into
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subscripted form x\<^isub>1, y\<^isub>2\<^isub>3.
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* Predefined LaTeX macros for Isabelle symbols \<bind> and \<then>
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(e.g. see ~~/src/HOL/Library/Monad_Syntax.thy).
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*** ML ***
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* Structure Proof_Context follows standard naming scheme.  Old
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ProofContext is still available for some time as legacy alias.
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* Structure Timing provides various operations for timing; supersedes
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former start_timing/end_timing etc.
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* Path.print is the official way to show file-system paths to users
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(including quotes etc.).
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* Inner syntax: identifiers in parse trees of generic categories
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"logic", "aprop", "idt" etc. carry position information (disguised as
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type constraints).  Occasional INCOMPATIBILITY with non-compliant
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translations that choke on unexpected type constraints.  Positions can
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be stripped in ML translations via Syntax.strip_positions /
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Syntax.strip_positions_ast, or via the syntax constant
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"_strip_positions" within parse trees.  As last resort, positions can
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be disabled via the configuration option Syntax.positions, which is
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called "syntax_positions" in Isar attribute syntax.
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* Discontinued special status of various ML structures that contribute
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to structure Syntax (Ast, Lexicon, Mixfix, Parser, Printer etc.): less
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pervasive content, no inclusion in structure Syntax.  INCOMPATIBILITY,
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refer directly to Ast.Constant, Lexicon.is_identifier,
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Syntax_Trans.mk_binder_tr etc.
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* Typed print translation: discontinued show_sorts argument, which is
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already available via context of "advanced" translation.
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* Refined PARALLEL_GOALS tactical: degrades gracefully for schematic
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goal states; body tactic needs to address all subgoals uniformly.
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* Slightly more special eq_list/eq_set, with shortcut involving
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pointer equality (assumes that eq relation is reflexive).
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* Classical tactics use proper Proof.context instead of historic types
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claset/clasimpset.  Old-style declarations like addIs, addEs, addDs
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operate directly on Proof.context.  Raw type claset retains its use as
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snapshot of the classical context, which can be recovered via
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(put_claset HOL_cs) etc.  Type clasimpset has been discontinued.
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INCOMPATIBILITY, classical tactics and derived proof methods require
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proper Proof.context.
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New in Isabelle2011 (January 2011)
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----------------------------------
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*** General ***
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* Experimental Prover IDE based on Isabelle/Scala and jEdit (see
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src/Tools/jEdit).  This also serves as IDE for Isabelle/ML, with
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useful tooltips and hyperlinks produced from its static analysis.  The
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bundled component provides an executable Isabelle tool that can be run
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like this:
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  Isabelle2011/bin/isabelle jedit
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* Significantly improved Isabelle/Isar implementation manual.
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* System settings: ISABELLE_HOME_USER now includes ISABELLE_IDENTIFIER
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(and thus refers to something like $HOME/.isabelle/Isabelle2011),
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while the default heap location within that directory lacks that extra
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suffix.  This isolates multiple Isabelle installations from each
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other, avoiding problems with old settings in new versions.
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INCOMPATIBILITY, need to copy/upgrade old user settings manually.
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* Source files are always encoded as UTF-8, instead of old-fashioned
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ISO-Latin-1.  INCOMPATIBILITY.  Isabelle LaTeX documents might require
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the following package declarations:
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  \usepackage[utf8]{inputenc}
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  \usepackage{textcomp}
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* Explicit treatment of UTF-8 sequences as Isabelle symbols, such that
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a Unicode character is treated as a single symbol, not a sequence of
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non-ASCII bytes as before.  Since Isabelle/ML string literals may
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contain symbols without further backslash escapes, Unicode can now be
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used here as well.  Recall that Symbol.explode in ML provides a
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consistent view on symbols, while raw explode (or String.explode)
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merely give a byte-oriented representation.
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* Theory loader: source files are primarily located via the master
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directory of each theory node (where the .thy file itself resides).
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The global load path is still partially available as legacy feature.
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Minor INCOMPATIBILITY due to subtle change in file lookup: use
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explicit paths, relatively to the theory.
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* Special treatment of ML file names has been discontinued.
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Historically, optional extensions .ML or .sml were added on demand --
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at the cost of clarity of file dependencies.  Recall that Isabelle/ML
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files exclusively use the .ML extension.  Minor INCOMPATIBILTY.
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* Various options that affect pretty printing etc. are now properly
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handled within the context via configuration options, instead of
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unsynchronized references or print modes.  There are both ML Config.T
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entities and Isar declaration attributes to access these.
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  ML (Config.T)                 Isar (attribute)
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  eta_contract                  eta_contract
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  show_brackets                 show_brackets
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  show_sorts                    show_sorts
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  show_types                    show_types
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  show_question_marks           show_question_marks
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  show_consts                   show_consts
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  show_abbrevs                  show_abbrevs
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  Syntax.ast_trace              syntax_ast_trace
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  Syntax.ast_stat               syntax_ast_stat
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  Syntax.ambiguity_level        syntax_ambiguity_level
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  Goal_Display.goals_limit      goals_limit
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  Goal_Display.show_main_goal   show_main_goal
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  Method.rule_trace             rule_trace
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  Thy_Output.display            thy_output_display
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  Thy_Output.quotes             thy_output_quotes
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  Thy_Output.indent             thy_output_indent
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  Thy_Output.source             thy_output_source
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  Thy_Output.break              thy_output_break
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Note that corresponding "..._default" references in ML may only be
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changed globally at the ROOT session setup, but *not* within a theory.
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The option "show_abbrevs" supersedes the former print mode
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"no_abbrevs" with inverted meaning.
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* More systematic naming of some configuration options.
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INCOMPATIBILITY.
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  trace_simp  ~>  simp_trace
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  debug_simp  ~>  simp_debug
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* Support for real valued configuration options, using simplistic
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floating-point notation that coincides with the inner syntax for
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float_token.
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* Support for real valued preferences (with approximative PGIP type):
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front-ends need to accept "pgint" values in float notation.
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INCOMPATIBILITY.
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* The IsabelleText font now includes Cyrillic, Hebrew, Arabic from
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DejaVu Sans.
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* Discontinued support for Poly/ML 5.0 and 5.1 versions.
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*** Pure ***
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* Command 'type_synonym' (with single argument) replaces somewhat
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outdated 'types', which is still available as legacy feature for some
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time.
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* Command 'nonterminal' (with 'and' separated list of arguments)
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replaces somewhat outdated 'nonterminals'.  INCOMPATIBILITY.
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* Command 'notepad' replaces former 'example_proof' for
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experimentation in Isar without any result.  INCOMPATIBILITY.
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* Locale interpretation commands 'interpret' and 'sublocale' accept
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lists of equations to map definitions in a locale to appropriate
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entities in the context of the interpretation.  The 'interpretation'
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command already provided this functionality.
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* Diagnostic command 'print_dependencies' prints the locale instances
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that would be activated if the specified expression was interpreted in
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the current context.  Variant "print_dependencies!" assumes a context
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without interpretations.
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* Diagnostic command 'print_interps' prints interpretations in proofs
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in addition to interpretations in theories.
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* Discontinued obsolete 'global' and 'local' commands to manipulate
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the theory name space.  Rare INCOMPATIBILITY.  The ML functions
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Sign.root_path and Sign.local_path may be applied directly where this
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feature is still required for historical reasons.
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* Discontinued obsolete 'constdefs' command.  INCOMPATIBILITY, use
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'definition' instead.
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* The "prems" fact, which refers to the accidental collection of
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foundational premises in the context, is now explicitly marked as
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legacy feature and will be discontinued soon.  Consider using "assms"
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of the head statement or reference facts by explicit names.
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* Document antiquotations @{class} and @{type} print classes and type
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constructors.
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* Document antiquotation @{file} checks file/directory entries within
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the local file system.
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*** HOL ***
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* Coercive subtyping: functions can be declared as coercions and type
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inference will add them as necessary upon input of a term.  Theory
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Complex_Main declares real :: nat => real and real :: int => real as
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coercions. A coercion function f is declared like this:
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  declare [[coercion f]]
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To lift coercions through type constructors (e.g. from nat => real to
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nat list => real list), map functions can be declared, e.g.
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  declare [[coercion_map map]]
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Currently coercion inference is activated only in theories including
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real numbers, i.e. descendants of Complex_Main.  This is controlled by
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the configuration option "coercion_enabled", e.g. it can be enabled in
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other theories like this:
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  declare [[coercion_enabled]]
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* Command 'partial_function' provides basic support for recursive
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function definitions over complete partial orders.  Concrete instances
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are provided for i) the option type, ii) tail recursion on arbitrary
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types, and iii) the heap monad of Imperative_HOL.  See
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src/HOL/ex/Fundefs.thy and src/HOL/Imperative_HOL/ex/Linked_Lists.thy
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for examples.
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* Function package: f.psimps rules are no longer implicitly declared
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as [simp].  INCOMPATIBILITY.
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* Datatype package: theorems generated for executable equality (class
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"eq") carry proper names and are treated as default code equations.
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* Inductive package: now offers command 'inductive_simps' to
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automatically derive instantiated and simplified equations for
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inductive predicates, similar to 'inductive_cases'.
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* Command 'enriched_type' allows to register properties of the
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functorial structure of types.
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* Improved infrastructure for term evaluation using code generator
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techniques, in particular static evaluation conversions.
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* Code generator: Scala (2.8 or higher) has been added to the target
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languages.
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haftmann@41398
   361
* Code generator: globbing constant expressions "*" and "Theory.*"
haftmann@41398
   362
have been replaced by the more idiomatic "_" and "Theory._".
haftmann@41398
   363
INCOMPATIBILITY.
haftmann@41398
   364
haftmann@41398
   365
* Code generator: export_code without explicit file declaration prints
haftmann@41398
   366
to standard output.  INCOMPATIBILITY.
haftmann@41398
   367
haftmann@41398
   368
* Code generator: do not print function definitions for case
haftmann@41398
   369
combinators any longer.
haftmann@41398
   370
wenzelm@41594
   371
* Code generator: simplification with rules determined with
wenzelm@41571
   372
src/Tools/Code/code_simp.ML and method "code_simp".
wenzelm@41571
   373
wenzelm@41594
   374
* Code generator for records: more idiomatic representation of record
wenzelm@40948
   375
types.  Warning: records are not covered by ancient SML code
wenzelm@40948
   376
generation any longer.  INCOMPATIBILITY.  In cases of need, a suitable
wenzelm@40948
   377
rep_datatype declaration helps to succeed then:
haftmann@38537
   378
haftmann@38537
   379
  record 'a foo = ...
haftmann@38537
   380
  ...
haftmann@38537
   381
  rep_datatype foo_ext ...
haftmann@38535
   382
wenzelm@41594
   383
* Records: logical foundation type for records does not carry a
wenzelm@41594
   384
'_type' suffix any longer (obsolete due to authentic syntax).
wenzelm@41594
   385
INCOMPATIBILITY.
wenzelm@41594
   386
haftmann@41398
   387
* Quickcheck now by default uses exhaustive testing instead of random
wenzelm@41571
   388
testing.  Random testing can be invoked by "quickcheck [random]",
wenzelm@41571
   389
exhaustive testing by "quickcheck [exhaustive]".
haftmann@41398
   390
haftmann@41398
   391
* Quickcheck instantiates polymorphic types with small finite
haftmann@41398
   392
datatypes by default. This enables a simple execution mechanism to
haftmann@41398
   393
handle quantifiers and function equality over the finite datatypes.
haftmann@41398
   394
wenzelm@41571
   395
* Quickcheck random generator has been renamed from "code" to
wenzelm@41571
   396
"random".  INCOMPATIBILITY.
haftmann@41398
   397
haftmann@41398
   398
* Quickcheck now has a configurable time limit which is set to 30
haftmann@41398
   399
seconds by default. This can be changed by adding [timeout = n] to the
haftmann@41398
   400
quickcheck command. The time limit for Auto Quickcheck is still set
haftmann@41398
   401
independently.
haftmann@38461
   402
haftmann@38461
   403
* Quickcheck in locales considers interpretations of that locale for
haftmann@38461
   404
counter example search.
haftmann@38461
   405
blanchet@40059
   406
* Sledgehammer:
wenzelm@41571
   407
  - Added "smt" and "remote_smt" provers based on the "smt" proof
wenzelm@41571
   408
    method. See the Sledgehammer manual for details ("isabelle doc
wenzelm@41571
   409
    sledgehammer").
blanchet@40059
   410
  - Renamed commands:
blanchet@40059
   411
    sledgehammer atp_info ~> sledgehammer running_provers
blanchet@40059
   412
    sledgehammer atp_kill ~> sledgehammer kill_provers
blanchet@40059
   413
    sledgehammer available_atps ~> sledgehammer available_provers
blanchet@40059
   414
    INCOMPATIBILITY.
blanchet@40059
   415
  - Renamed options:
blanchet@40059
   416
    sledgehammer [atps = ...] ~> sledgehammer [provers = ...]
blanchet@40062
   417
    sledgehammer [atp = ...] ~> sledgehammer [prover = ...]
blanchet@40341
   418
    sledgehammer [timeout = 77 s] ~> sledgehammer [timeout = 77]
blanchet@40341
   419
    (and "ms" and "min" are no longer supported)
blanchet@40341
   420
    INCOMPATIBILITY.
blanchet@40341
   421
blanchet@40341
   422
* Nitpick:
blanchet@40341
   423
  - Renamed options:
blanchet@40341
   424
    nitpick [timeout = 77 s] ~> nitpick [timeout = 77]
blanchet@40341
   425
    nitpick [tac_timeout = 777 ms] ~> nitpick [tac_timeout = 0.777]
blanchet@40059
   426
    INCOMPATIBILITY.
blanchet@40725
   427
  - Added support for partial quotient types.
blanchet@40725
   428
  - Added local versions of the "Nitpick.register_xxx" functions.
blanchet@40725
   429
  - Added "whack" option.
blanchet@40725
   430
  - Allow registration of quotient types as codatatypes.
blanchet@40725
   431
  - Improved "merge_type_vars" option to merge more types.
blanchet@40725
   432
  - Removed unsound "fast_descrs" option.
blanchet@40725
   433
  - Added custom symmetry breaking for datatypes, making it possible to reach
blanchet@40725
   434
    higher cardinalities.
blanchet@40725
   435
  - Prevent the expansion of too large definitions.
blanchet@39957
   436
wenzelm@41571
   437
* Proof methods "metis" and "meson" now have configuration options
wenzelm@41571
   438
"meson_trace", "metis_trace", and "metis_verbose" that can be enabled
wenzelm@41571
   439
to diagnose these tools. E.g.
wenzelm@41571
   440
wenzelm@41571
   441
    using [[metis_trace = true]]
wenzelm@41571
   442
haftmann@41398
   443
* Auto Solve: Renamed "Auto Solve Direct".  The tool is now available
haftmann@41398
   444
manually as command 'solve_direct'.
haftmann@41398
   445
boehmes@41601
   446
* The default SMT solver Z3 must be enabled explicitly (due to
boehmes@41601
   447
licensing issues) by setting the environment variable
wenzelm@41603
   448
Z3_NON_COMMERCIAL in etc/settings of the component, for example.  For
wenzelm@41603
   449
commercial applications, the SMT solver CVC3 is provided as fall-back;
wenzelm@41603
   450
changing the SMT solver is done via the configuration option
wenzelm@41603
   451
"smt_solver".
boehmes@41432
   452
boehmes@41432
   453
* Remote SMT solvers need to be referred to by the "remote_" prefix,
wenzelm@41571
   454
i.e. "remote_cvc3" and "remote_z3".
wenzelm@41571
   455
wenzelm@41571
   456
* Added basic SMT support for datatypes, records, and typedefs using
wenzelm@41571
   457
the oracle mode (no proofs).  Direct support of pairs has been dropped
wenzelm@41571
   458
in exchange (pass theorems fst_conv snd_conv pair_collapse to the SMT
wenzelm@41571
   459
support for a similar behavior).  Minor INCOMPATIBILITY.
boehmes@41432
   460
boehmes@40162
   461
* Changed SMT configuration options:
boehmes@40162
   462
  - Renamed:
boehmes@41432
   463
    z3_proofs ~> smt_oracle (with inverted meaning)
boehmes@40162
   464
    z3_trace_assms ~> smt_trace_used_facts
boehmes@40162
   465
    INCOMPATIBILITY.
boehmes@40162
   466
  - Added:
boehmes@40424
   467
    smt_verbose
boehmes@41432
   468
    smt_random_seed
boehmes@40424
   469
    smt_datatypes
boehmes@41432
   470
    smt_infer_triggers
boehmes@41432
   471
    smt_monomorph_limit
boehmes@40162
   472
    cvc3_options
boehmes@41432
   473
    remote_cvc3_options
boehmes@41432
   474
    remote_z3_options
boehmes@40162
   475
    yices_options
blanchet@39957
   476
wenzelm@40948
   477
* Boogie output files (.b2i files) need to be declared in the theory
wenzelm@40948
   478
header.
boehmes@40580
   479
wenzelm@41594
   480
* Simplification procedure "list_to_set_comprehension" rewrites list
wenzelm@41594
   481
comprehensions applied to List.set to set comprehensions.  Occasional
wenzelm@41594
   482
INCOMPATIBILITY, may be deactivated like this:
wenzelm@41594
   483
wenzelm@41594
   484
  declare [[simproc del: list_to_set_comprehension]]
wenzelm@41594
   485
wenzelm@41573
   486
* Removed old version of primrec package.  INCOMPATIBILITY.
haftmann@41398
   487
haftmann@41398
   488
* Removed simplifier congruence rule of "prod_case", as has for long
haftmann@41398
   489
been the case with "split".  INCOMPATIBILITY.
haftmann@41398
   490
haftmann@41398
   491
* String.literal is a type, but not a datatype.  INCOMPATIBILITY.
haftmann@41398
   492
krauss@40388
   493
* Removed [split_format ... and ... and ...] version of
krauss@40388
   494
[split_format].  Potential INCOMPATIBILITY.
krauss@40388
   495
wenzelm@41571
   496
* Predicate "sorted" now defined inductively, with nice induction
wenzelm@41571
   497
rules.  INCOMPATIBILITY: former sorted.simps now named sorted_simps.
haftmann@41398
   498
haftmann@41398
   499
* Constant "contents" renamed to "the_elem", to free the generic name
haftmann@41398
   500
contents for other uses.  INCOMPATIBILITY.
haftmann@41398
   501
haftmann@41398
   502
* Renamed class eq and constant eq (for code generation) to class
haftmann@41398
   503
equal and constant equal, plus renaming of related facts and various
haftmann@41398
   504
tuning.  INCOMPATIBILITY.
haftmann@41398
   505
haftmann@41398
   506
* Dropped type classes mult_mono and mult_mono1.  INCOMPATIBILITY.
haftmann@41398
   507
wenzelm@41571
   508
* Removed output syntax "'a ~=> 'b" for "'a => 'b option".
wenzelm@41571
   509
INCOMPATIBILITY.
haftmann@41398
   510
haftmann@41398
   511
* Renamed theory Fset to Cset, type Fset.fset to Cset.set, in order to
haftmann@41398
   512
avoid confusion with finite sets.  INCOMPATIBILITY.
haftmann@41398
   513
haftmann@41398
   514
* Abandoned locales equiv, congruent and congruent2 for equivalence
haftmann@41398
   515
relations.  INCOMPATIBILITY: use equivI rather than equiv_intro (same
haftmann@41398
   516
for congruent(2)).
haftmann@41398
   517
haftmann@41398
   518
* Some previously unqualified names have been qualified:
haftmann@41398
   519
haftmann@41398
   520
  types
haftmann@41398
   521
    bool ~> HOL.bool
haftmann@41398
   522
    nat ~> Nat.nat
haftmann@41398
   523
haftmann@41398
   524
  constants
haftmann@41398
   525
    Trueprop ~> HOL.Trueprop
haftmann@41398
   526
    True ~> HOL.True
haftmann@41398
   527
    False ~> HOL.False
haftmann@41398
   528
    op & ~> HOL.conj
haftmann@41398
   529
    op | ~> HOL.disj
haftmann@41398
   530
    op --> ~> HOL.implies
haftmann@41398
   531
    op = ~> HOL.eq
haftmann@41398
   532
    Not ~> HOL.Not
haftmann@41398
   533
    The ~> HOL.The
haftmann@41398
   534
    All ~> HOL.All
haftmann@41398
   535
    Ex ~> HOL.Ex
haftmann@41398
   536
    Ex1 ~> HOL.Ex1
haftmann@41398
   537
    Let ~> HOL.Let
haftmann@41398
   538
    If ~> HOL.If
haftmann@41398
   539
    Ball ~> Set.Ball
haftmann@41398
   540
    Bex ~> Set.Bex
haftmann@41398
   541
    Suc ~> Nat.Suc
haftmann@41398
   542
    Pair ~> Product_Type.Pair
haftmann@41398
   543
    fst ~> Product_Type.fst
haftmann@41398
   544
    snd ~> Product_Type.snd
haftmann@41398
   545
    curry ~> Product_Type.curry
haftmann@41398
   546
    op : ~> Set.member
haftmann@41398
   547
    Collect ~> Set.Collect
haftmann@41398
   548
haftmann@41398
   549
INCOMPATIBILITY.
haftmann@41398
   550
haftmann@41398
   551
* More canonical naming convention for some fundamental definitions:
haftmann@41398
   552
haftmann@41398
   553
    bot_bool_eq ~> bot_bool_def
haftmann@41398
   554
    top_bool_eq ~> top_bool_def
haftmann@41398
   555
    inf_bool_eq ~> inf_bool_def
haftmann@41398
   556
    sup_bool_eq ~> sup_bool_def
haftmann@41398
   557
    bot_fun_eq  ~> bot_fun_def
haftmann@41398
   558
    top_fun_eq  ~> top_fun_def
haftmann@41398
   559
    inf_fun_eq  ~> inf_fun_def
haftmann@41398
   560
    sup_fun_eq  ~> sup_fun_def
haftmann@41398
   561
haftmann@41398
   562
INCOMPATIBILITY.
haftmann@41398
   563
haftmann@41398
   564
* More stylized fact names:
haftmann@41398
   565
haftmann@41398
   566
  expand_fun_eq ~> fun_eq_iff
haftmann@41398
   567
  expand_set_eq ~> set_eq_iff
haftmann@41398
   568
  set_ext       ~> set_eqI
haftmann@41398
   569
  nat_number    ~> eval_nat_numeral
haftmann@41398
   570
haftmann@41398
   571
INCOMPATIBILITY.
haftmann@41398
   572
wenzelm@41571
   573
* Refactoring of code-generation specific operations in theory List:
haftmann@41398
   574
haftmann@41398
   575
  constants
haftmann@41398
   576
    null ~> List.null
haftmann@41398
   577
haftmann@41398
   578
  facts
haftmann@41398
   579
    mem_iff ~> member_def
haftmann@41398
   580
    null_empty ~> null_def
haftmann@41398
   581
haftmann@41398
   582
INCOMPATIBILITY.  Note that these were not supposed to be used
haftmann@41398
   583
regularly unless for striking reasons; their main purpose was code
haftmann@41398
   584
generation.
haftmann@41398
   585
haftmann@41398
   586
Various operations from the Haskell prelude are used for generating
haftmann@41398
   587
Haskell code.
haftmann@41398
   588
wenzelm@41571
   589
* Term "bij f" is now an abbreviation of "bij_betw f UNIV UNIV".  Term
wenzelm@41571
   590
"surj f" is now an abbreviation of "range f = UNIV".  The theorems
wenzelm@41571
   591
bij_def and surj_def are unchanged.  INCOMPATIBILITY.
haftmann@41398
   592
haftmann@41398
   593
* Abolished some non-alphabetic type names: "prod" and "sum" replace
haftmann@41398
   594
"*" and "+" respectively.  INCOMPATIBILITY.
haftmann@41398
   595
haftmann@41398
   596
* Name "Plus" of disjoint sum operator "<+>" is now hidden.  Write
wenzelm@41571
   597
"Sum_Type.Plus" instead.
haftmann@41398
   598
haftmann@41398
   599
* Constant "split" has been merged with constant "prod_case"; names of
haftmann@41398
   600
ML functions, facts etc. involving split have been retained so far,
haftmann@41398
   601
though.  INCOMPATIBILITY.
haftmann@41398
   602
haftmann@41398
   603
* Dropped old infix syntax "_ mem _" for List.member; use "_ : set _"
haftmann@41398
   604
instead.  INCOMPATIBILITY.
haftmann@41398
   605
wenzelm@41571
   606
* Removed lemma "Option.is_none_none" which duplicates "is_none_def".
haftmann@41398
   607
INCOMPATIBILITY.
haftmann@41398
   608
wenzelm@41594
   609
* Former theory Library/Enum is now part of the HOL-Main image.
wenzelm@41594
   610
INCOMPATIBILITY: all constants of the Enum theory now have to be
wenzelm@41594
   611
referred to by its qualified name.
wenzelm@41594
   612
wenzelm@41594
   613
  enum    ~>  Enum.enum
wenzelm@41594
   614
  nlists  ~>  Enum.nlists
wenzelm@41594
   615
  product ~>  Enum.product
wenzelm@41594
   616
wenzelm@41594
   617
* Theory Library/Monad_Syntax provides do-syntax for monad types.
wenzelm@41594
   618
Syntax in Library/State_Monad has been changed to avoid ambiguities.
wenzelm@41594
   619
INCOMPATIBILITY.
wenzelm@41594
   620
wenzelm@41594
   621
* Theory Library/SetsAndFunctions has been split into
wenzelm@41594
   622
Library/Function_Algebras and Library/Set_Algebras; canonical names
wenzelm@41594
   623
for instance definitions for functions; various improvements.
wenzelm@41594
   624
INCOMPATIBILITY.
wenzelm@41594
   625
wenzelm@41594
   626
* Theory Library/Multiset provides stable quicksort implementation of
wenzelm@41594
   627
sort_key.
wenzelm@41594
   628
wenzelm@41594
   629
* Theory Library/Multiset: renamed empty_idemp ~> empty_neutral.
wenzelm@41594
   630
INCOMPATIBILITY.
wenzelm@41594
   631
wenzelm@41594
   632
* Session Multivariate_Analysis: introduced a type class for euclidean
wenzelm@41594
   633
space.  Most theorems are now stated in terms of euclidean spaces
wenzelm@41594
   634
instead of finite cartesian products.
wenzelm@41594
   635
wenzelm@41594
   636
  types
wenzelm@41594
   637
    real ^ 'n ~>  'a::real_vector
wenzelm@41594
   638
              ~>  'a::euclidean_space
wenzelm@41594
   639
              ~>  'a::ordered_euclidean_space
wenzelm@41594
   640
        (depends on your needs)
wenzelm@41594
   641
wenzelm@41594
   642
  constants
wenzelm@41594
   643
     _ $ _        ~> _ $$ _
wenzelm@41594
   644
     \<chi> x. _  ~> \<chi>\<chi> x. _
wenzelm@41594
   645
     CARD('n)     ~> DIM('a)
wenzelm@41594
   646
wenzelm@41594
   647
Also note that the indices are now natural numbers and not from some
wenzelm@41594
   648
finite type. Finite cartesian products of euclidean spaces, products
wenzelm@41594
   649
of euclidean spaces the real and complex numbers are instantiated to
wenzelm@41594
   650
be euclidean_spaces.  INCOMPATIBILITY.
wenzelm@41594
   651
wenzelm@41594
   652
* Session Probability: introduced pextreal as positive extended real
wenzelm@41594
   653
numbers.  Use pextreal as value for measures.  Introduce the
wenzelm@41594
   654
Radon-Nikodym derivative, product spaces and Fubini's theorem for
wenzelm@41594
   655
arbitrary sigma finite measures.  Introduces Lebesgue measure based on
wenzelm@41594
   656
the integral in Multivariate Analysis.  INCOMPATIBILITY.
wenzelm@41594
   657
wenzelm@41594
   658
* Session Imperative_HOL: revamped, corrected dozens of inadequacies.
wenzelm@41594
   659
INCOMPATIBILITY.
wenzelm@41594
   660
wenzelm@41594
   661
* Session SPARK (with image HOL-SPARK) provides commands to load and
wenzelm@41594
   662
prove verification conditions generated by the SPARK Ada program
wenzelm@41594
   663
verifier.  See also src/HOL/SPARK and src/HOL/SPARK/Examples.
berghofe@41567
   664
huffman@40621
   665
ballarin@41433
   666
*** HOL-Algebra ***
ballarin@41433
   667
ballarin@41433
   668
* Theorems for additive ring operations (locale abelian_monoid and
ballarin@41433
   669
descendants) are generated by interpretation from their multiplicative
ballarin@41434
   670
counterparts.  Names (in particular theorem names) have the mandatory
ballarin@41434
   671
qualifier 'add'.  Previous theorem names are redeclared for
ballarin@41434
   672
compatibility.
ballarin@41434
   673
wenzelm@41571
   674
* Structure "int_ring" is now an abbreviation (previously a
ballarin@41434
   675
definition).  This fits more natural with advanced interpretations.
ballarin@41433
   676
ballarin@41433
   677
huffman@40621
   678
*** HOLCF ***
huffman@40621
   679
huffman@40621
   680
* The domain package now runs in definitional mode by default: The
wenzelm@41571
   681
former command 'new_domain' is now called 'domain'.  To use the domain
huffman@40621
   682
package in its original axiomatic mode, use 'domain (unsafe)'.
huffman@40621
   683
INCOMPATIBILITY.
huffman@40621
   684
wenzelm@41571
   685
* The new class "domain" is now the default sort.  Class "predomain"
wenzelm@41571
   686
is an unpointed version of "domain". Theories can be updated by
wenzelm@41571
   687
replacing sort annotations as shown below.  INCOMPATIBILITY.
huffman@40621
   688
huffman@40621
   689
  'a::type ~> 'a::countable
huffman@40621
   690
  'a::cpo  ~> 'a::predomain
huffman@40621
   691
  'a::pcpo ~> 'a::domain
huffman@40621
   692
wenzelm@41571
   693
* The old type class "rep" has been superseded by class "domain".
huffman@40621
   694
Accordingly, users of the definitional package must remove any
wenzelm@41571
   695
"default_sort rep" declarations.  INCOMPATIBILITY.
huffman@40621
   696
huffman@41401
   697
* The domain package (definitional mode) now supports unpointed
huffman@41401
   698
predomain argument types, as long as they are marked 'lazy'. (Strict
wenzelm@41571
   699
arguments must be in class "domain".) For example, the following
huffman@41401
   700
domain definition now works:
huffman@41401
   701
huffman@41401
   702
  domain natlist = nil | cons (lazy "nat discr") (lazy "natlist")
huffman@41401
   703
huffman@41401
   704
* Theory HOLCF/Library/HOL_Cpo provides cpo and predomain class
wenzelm@41571
   705
instances for types from main HOL: bool, nat, int, char, 'a + 'b,
wenzelm@41571
   706
'a option, and 'a list.  Additionally, it configures fixrec and the
wenzelm@41571
   707
domain package to work with these types.  For example:
huffman@41401
   708
huffman@41401
   709
  fixrec isInl :: "('a + 'b) u -> tr"
huffman@41401
   710
    where "isInl$(up$(Inl x)) = TT" | "isInl$(up$(Inr y)) = FF"
huffman@41401
   711
huffman@41401
   712
  domain V = VFun (lazy "V -> V") | VCon (lazy "nat") (lazy "V list")
huffman@41401
   713
wenzelm@41571
   714
* The "(permissive)" option of fixrec has been replaced with a
wenzelm@41571
   715
per-equation "(unchecked)" option. See
wenzelm@41571
   716
src/HOL/HOLCF/Tutorial/Fixrec_ex.thy for examples. INCOMPATIBILITY.
wenzelm@41571
   717
wenzelm@41571
   718
* The "bifinite" class no longer fixes a constant "approx"; the class
wenzelm@41571
   719
now just asserts that such a function exists.  INCOMPATIBILITY.
wenzelm@41571
   720
wenzelm@41571
   721
* Former type "alg_defl" has been renamed to "defl".  HOLCF no longer
huffman@41287
   722
defines an embedding of type 'a defl into udom by default; instances
wenzelm@41571
   723
of "bifinite" and "domain" classes are available in
wenzelm@41571
   724
src/HOL/HOLCF/Library/Defl_Bifinite.thy.
wenzelm@41571
   725
wenzelm@41571
   726
* The syntax "REP('a)" has been replaced with "DEFL('a)".
wenzelm@41571
   727
wenzelm@41571
   728
* The predicate "directed" has been removed.  INCOMPATIBILITY.
wenzelm@41571
   729
wenzelm@41571
   730
* The type class "finite_po" has been removed.  INCOMPATIBILITY.
wenzelm@41571
   731
wenzelm@41571
   732
* The function "cprod_map" has been renamed to "prod_map".
huffman@41401
   733
INCOMPATIBILITY.
huffman@41401
   734
huffman@41401
   735
* The monadic bind operator on each powerdomain has new binder syntax
wenzelm@41571
   736
similar to sets, e.g. "\<Union>\<sharp>x\<in>xs. t" represents
wenzelm@41571
   737
"upper_bind\<cdot>xs\<cdot>(\<Lambda> x. t)".
huffman@41401
   738
huffman@41401
   739
* The infix syntax for binary union on each powerdomain has changed
wenzelm@41571
   740
from e.g. "+\<sharp>" to "\<union>\<sharp>", for consistency with set
wenzelm@41571
   741
syntax.  INCOMPATIBILITY.
wenzelm@41571
   742
wenzelm@41571
   743
* The constant "UU" has been renamed to "bottom".  The syntax "UU" is
huffman@41429
   744
still supported as an input translation.
huffman@41429
   745
huffman@40621
   746
* Renamed some theorems (the original names are also still available).
wenzelm@41571
   747
huffman@40621
   748
  expand_fun_below   ~> fun_below_iff
huffman@40621
   749
  below_fun_ext      ~> fun_belowI
huffman@40621
   750
  expand_cfun_eq     ~> cfun_eq_iff
huffman@40621
   751
  ext_cfun           ~> cfun_eqI
huffman@40621
   752
  expand_cfun_below  ~> cfun_below_iff
huffman@40621
   753
  below_cfun_ext     ~> cfun_belowI
huffman@40621
   754
  cont2cont_Rep_CFun ~> cont2cont_APP
huffman@40621
   755
huffman@40621
   756
* The Abs and Rep functions for various types have changed names.
wenzelm@40948
   757
Related theorem names have also changed to match. INCOMPATIBILITY.
wenzelm@41571
   758
huffman@40621
   759
  Rep_CFun  ~> Rep_cfun
huffman@40621
   760
  Abs_CFun  ~> Abs_cfun
huffman@40621
   761
  Rep_Sprod ~> Rep_sprod
huffman@40621
   762
  Abs_Sprod ~> Abs_sprod
huffman@40621
   763
  Rep_Ssum  ~> Rep_ssum
huffman@40621
   764
  Abs_Ssum  ~> Abs_ssum
huffman@40621
   765
huffman@40621
   766
* Lemmas with names of the form *_defined_iff or *_strict_iff have
wenzelm@41571
   767
been renamed to *_bottom_iff.  INCOMPATIBILITY.
huffman@40621
   768
huffman@40621
   769
* Various changes to bisimulation/coinduction with domain package:
wenzelm@41571
   770
wenzelm@41571
   771
  - Definitions of "bisim" constants no longer mention definedness.
wenzelm@41571
   772
  - With mutual recursion, "bisim" predicate is now curried.
huffman@40621
   773
  - With mutual recursion, each type gets a separate coind theorem.
huffman@40621
   774
  - Variable names in bisim_def and coinduct rules have changed.
wenzelm@41571
   775
huffman@40621
   776
INCOMPATIBILITY.
huffman@40621
   777
wenzelm@41571
   778
* Case combinators generated by the domain package for type "foo" are
wenzelm@41571
   779
now named "foo_case" instead of "foo_when".  INCOMPATIBILITY.
huffman@40621
   780
huffman@40771
   781
* Several theorems have been renamed to more accurately reflect the
wenzelm@41571
   782
names of constants and types involved.  INCOMPATIBILITY.
wenzelm@41571
   783
huffman@40771
   784
  thelub_const    ~> lub_const
huffman@40771
   785
  lub_const       ~> is_lub_const
huffman@40771
   786
  thelubI         ~> lub_eqI
huffman@40771
   787
  is_lub_lub      ~> is_lubD2
huffman@40771
   788
  lubI            ~> is_lub_lub
huffman@40771
   789
  unique_lub      ~> is_lub_unique
huffman@40771
   790
  is_ub_lub       ~> is_lub_rangeD1
huffman@40771
   791
  lub_bin_chain   ~> is_lub_bin_chain
huffman@41030
   792
  lub_fun         ~> is_lub_fun
huffman@41030
   793
  thelub_fun      ~> lub_fun
huffman@41031
   794
  thelub_cfun     ~> lub_cfun
huffman@40771
   795
  thelub_Pair     ~> lub_Pair
huffman@40771
   796
  lub_cprod       ~> is_lub_prod
huffman@40771
   797
  thelub_cprod    ~> lub_prod
huffman@40771
   798
  minimal_cprod   ~> minimal_prod
huffman@40771
   799
  inst_cprod_pcpo ~> inst_prod_pcpo
huffman@41430
   800
  UU_I            ~> bottomI
huffman@41430
   801
  compact_UU      ~> compact_bottom
huffman@41430
   802
  deflation_UU    ~> deflation_bottom
huffman@41430
   803
  finite_deflation_UU ~> finite_deflation_bottom
huffman@40771
   804
wenzelm@41571
   805
* Many legacy theorem names have been discontinued.  INCOMPATIBILITY.
wenzelm@41571
   806
huffman@40621
   807
  sq_ord_less_eq_trans ~> below_eq_trans
huffman@40621
   808
  sq_ord_eq_less_trans ~> eq_below_trans
huffman@40621
   809
  refl_less            ~> below_refl
huffman@40621
   810
  trans_less           ~> below_trans
huffman@40621
   811
  antisym_less         ~> below_antisym
huffman@40621
   812
  antisym_less_inverse ~> po_eq_conv [THEN iffD1]
huffman@40621
   813
  box_less             ~> box_below
huffman@40621
   814
  rev_trans_less       ~> rev_below_trans
huffman@40621
   815
  not_less2not_eq      ~> not_below2not_eq
huffman@40621
   816
  less_UU_iff          ~> below_UU_iff
huffman@40621
   817
  flat_less_iff        ~> flat_below_iff
huffman@40621
   818
  adm_less             ~> adm_below
huffman@40621
   819
  adm_not_less         ~> adm_not_below
huffman@40621
   820
  adm_compact_not_less ~> adm_compact_not_below
huffman@40621
   821
  less_fun_def         ~> below_fun_def
huffman@40621
   822
  expand_fun_less      ~> fun_below_iff
huffman@40621
   823
  less_fun_ext         ~> fun_belowI
huffman@40621
   824
  less_discr_def       ~> below_discr_def
huffman@40621
   825
  discr_less_eq        ~> discr_below_eq
huffman@40621
   826
  less_unit_def        ~> below_unit_def
huffman@40621
   827
  less_cprod_def       ~> below_prod_def
huffman@40621
   828
  prod_lessI           ~> prod_belowI
huffman@40621
   829
  Pair_less_iff        ~> Pair_below_iff
huffman@40621
   830
  fst_less_iff         ~> fst_below_iff
huffman@40621
   831
  snd_less_iff         ~> snd_below_iff
huffman@40621
   832
  expand_cfun_less     ~> cfun_below_iff
huffman@40621
   833
  less_cfun_ext        ~> cfun_belowI
huffman@40621
   834
  injection_less       ~> injection_below
huffman@40621
   835
  less_up_def          ~> below_up_def
huffman@40621
   836
  not_Iup_less         ~> not_Iup_below
huffman@40621
   837
  Iup_less             ~> Iup_below
huffman@40621
   838
  up_less              ~> up_below
huffman@40621
   839
  Def_inject_less_eq   ~> Def_below_Def
huffman@40621
   840
  Def_less_is_eq       ~> Def_below_iff
huffman@40621
   841
  spair_less_iff       ~> spair_below_iff
huffman@40621
   842
  less_sprod           ~> below_sprod
huffman@40621
   843
  spair_less           ~> spair_below
huffman@40621
   844
  sfst_less_iff        ~> sfst_below_iff
huffman@40621
   845
  ssnd_less_iff        ~> ssnd_below_iff
huffman@40621
   846
  fix_least_less       ~> fix_least_below
huffman@40621
   847
  dist_less_one        ~> dist_below_one
huffman@40621
   848
  less_ONE             ~> below_ONE
huffman@40621
   849
  ONE_less_iff         ~> ONE_below_iff
huffman@40621
   850
  less_sinlD           ~> below_sinlD
huffman@40621
   851
  less_sinrD           ~> below_sinrD
huffman@40621
   852
huffman@40621
   853
wenzelm@40948
   854
*** FOL and ZF ***
haftmann@38522
   855
wenzelm@41310
   856
* All constant names are now qualified internally and use proper
wenzelm@41310
   857
identifiers, e.g. "IFOL.eq" instead of "op =".  INCOMPATIBILITY.
wenzelm@41310
   858
haftmann@38522
   859
wenzelm@37868
   860
*** ML ***
wenzelm@37868
   861
wenzelm@41594
   862
* Antiquotation @{assert} inlines a function bool -> unit that raises
wenzelm@41594
   863
Fail if the argument is false.  Due to inlining the source position of
wenzelm@41594
   864
failed assertions is included in the error output.
wenzelm@41594
   865
wenzelm@41594
   866
* Discontinued antiquotation @{theory_ref}, which is obsolete since ML
wenzelm@41594
   867
text is in practice always evaluated with a stable theory checkpoint.
wenzelm@41594
   868
Minor INCOMPATIBILITY, use (Theory.check_thy @{theory}) instead.
wenzelm@41594
   869
wenzelm@41594
   870
* Antiquotation @{theory A} refers to theory A from the ancestry of
wenzelm@41594
   871
the current context, not any accidental theory loader state as before.
wenzelm@41594
   872
Potential INCOMPATIBILITY, subtle change in semantics.
wenzelm@41228
   873
wenzelm@40956
   874
* Syntax.pretty_priority (default 0) configures the required priority
wenzelm@40956
   875
of pretty-printed output and thus affects insertion of parentheses.
wenzelm@40956
   876
wenzelm@40959
   877
* Syntax.default_root (default "any") configures the inner syntax
wenzelm@40959
   878
category (nonterminal symbol) for parsing of terms.
wenzelm@40959
   879
wenzelm@40722
   880
* Former exception Library.UnequalLengths now coincides with
wenzelm@40722
   881
ListPair.UnequalLengths.
wenzelm@40722
   882
wenzelm@41594
   883
* Renamed structure MetaSimplifier to Raw_Simplifier.  Note that the
wenzelm@41594
   884
main functionality is provided by structure Simplifier.
wenzelm@41594
   885
wenzelm@40627
   886
* Renamed raw "explode" function to "raw_explode" to emphasize its
wenzelm@40627
   887
meaning.  Note that internally to Isabelle, Symbol.explode is used in
wenzelm@40627
   888
almost all situations.
wenzelm@40627
   889
wenzelm@40318
   890
* Discontinued obsolete function sys_error and exception SYS_ERROR.
wenzelm@40318
   891
See implementation manual for further details on exceptions in
wenzelm@40318
   892
Isabelle/ML.
wenzelm@40318
   893
wenzelm@39616
   894
* Renamed setmp_noncritical to Unsynchronized.setmp to emphasize its
wenzelm@39616
   895
meaning.
wenzelm@39616
   896
wenzelm@39557
   897
* Renamed structure PureThy to Pure_Thy and moved most of its
wenzelm@39557
   898
operations to structure Global_Theory, to emphasize that this is
wenzelm@39557
   899
rarely-used global-only stuff.
wenzelm@39557
   900
wenzelm@39513
   901
* Discontinued Output.debug.  Minor INCOMPATIBILITY, use plain writeln
wenzelm@39513
   902
instead (or tracing for high-volume output).
wenzelm@39513
   903
wenzelm@38980
   904
* Configuration option show_question_marks only affects regular pretty
wenzelm@38980
   905
printing of types and terms, not raw Term.string_of_vname.
wenzelm@38980
   906
wenzelm@39164
   907
* ML_Context.thm and ML_Context.thms are no longer pervasive.  Rare
wenzelm@39164
   908
INCOMPATIBILITY, superseded by static antiquotations @{thm} and
wenzelm@39164
   909
@{thms} for most purposes.
wenzelm@39164
   910
wenzelm@41594
   911
* ML structure Unsynchronized is never opened, not even in Isar
wenzelm@38980
   912
interaction mode as before.  Old Unsynchronized.set etc. have been
wenzelm@38980
   913
discontinued -- use plain := instead.  This should be *rare* anyway,
wenzelm@38980
   914
since modern tools always work via official context data, notably
wenzelm@38980
   915
configuration options.
wenzelm@38980
   916
wenzelm@39239
   917
* Parallel and asynchronous execution requires special care concerning
wenzelm@39239
   918
interrupts.  Structure Exn provides some convenience functions that
wenzelm@39239
   919
avoid working directly with raw Interrupt.  User code must not absorb
wenzelm@39239
   920
interrupts -- intermediate handling (for cleanup etc.) needs to be
wenzelm@39239
   921
followed by re-raising of the original exception.  Another common
wenzelm@39239
   922
source of mistakes are "handle _" patterns, which make the meaning of
wenzelm@39239
   923
the program subject to physical effects of the environment.
wenzelm@39239
   924
wenzelm@37868
   925
wenzelm@37868
   926
wenzelm@37144
   927
New in Isabelle2009-2 (June 2010)
wenzelm@37144
   928
---------------------------------
haftmann@33993
   929
wenzelm@35260
   930
*** General ***
wenzelm@35260
   931
wenzelm@35436
   932
* Authentic syntax for *all* logical entities (type classes, type
wenzelm@35436
   933
constructors, term constants): provides simple and robust
wenzelm@35436
   934
correspondence between formal entities and concrete syntax.  Within
wenzelm@35436
   935
the parse tree / AST representations, "constants" are decorated by
wenzelm@35436
   936
their category (class, type, const) and spelled out explicitly with
wenzelm@35436
   937
their full internal name.
wenzelm@35436
   938
wenzelm@35436
   939
Substantial INCOMPATIBILITY concerning low-level syntax declarations
wenzelm@35436
   940
and translations (translation rules and translation functions in ML).
wenzelm@35436
   941
Some hints on upgrading:
wenzelm@35260
   942
wenzelm@35260
   943
  - Many existing uses of 'syntax' and 'translations' can be replaced
wenzelm@35436
   944
    by more modern 'type_notation', 'notation' and 'abbreviation',
wenzelm@35436
   945
    which are independent of this issue.
wenzelm@35260
   946
wenzelm@35260
   947
  - 'translations' require markup within the AST; the term syntax
wenzelm@35260
   948
    provides the following special forms:
wenzelm@35260
   949
wenzelm@35260
   950
      CONST c   -- produces syntax version of constant c from context
wenzelm@35261
   951
      XCONST c  -- literally c, checked as constant from context
wenzelm@35261
   952
      c         -- literally c, if declared by 'syntax'
wenzelm@35261
   953
wenzelm@35261
   954
    Plain identifiers are treated as AST variables -- occasionally the
wenzelm@35261
   955
    system indicates accidental variables via the error "rhs contains
wenzelm@35261
   956
    extra variables".
wenzelm@35260
   957
wenzelm@35436
   958
    Type classes and type constructors are marked according to their
wenzelm@35436
   959
    concrete syntax.  Some old translations rules need to be written
wenzelm@35436
   960
    for the "type" category, using type constructor application
wenzelm@35436
   961
    instead of pseudo-term application of the default category
wenzelm@35436
   962
    "logic".
wenzelm@35436
   963
wenzelm@35260
   964
  - 'parse_translation' etc. in ML may use the following
wenzelm@35260
   965
    antiquotations:
wenzelm@35260
   966
wenzelm@35436
   967
      @{class_syntax c}   -- type class c within parse tree / AST
wenzelm@35436
   968
      @{term_syntax c}    -- type constructor c within parse tree / AST
wenzelm@35260
   969
      @{const_syntax c}   -- ML version of "CONST c" above
wenzelm@35260
   970
      @{syntax_const c}   -- literally c (checked wrt. 'syntax' declarations)
wenzelm@35260
   971
wenzelm@35436
   972
  - Literal types within 'typed_print_translations', i.e. those *not*
wenzelm@35436
   973
    represented as pseudo-terms are represented verbatim.  Use @{class
wenzelm@35436
   974
    c} or @{type_name c} here instead of the above syntax
wenzelm@35436
   975
    antiquotations.
wenzelm@35436
   976
wenzelm@35260
   977
Note that old non-authentic syntax was based on unqualified base
wenzelm@35436
   978
names, so all of the above "constant" names would coincide.  Recall
wenzelm@35436
   979
that 'print_syntax' and ML_command "set Syntax.trace_ast" help to
wenzelm@35436
   980
diagnose syntax problems.
wenzelm@35260
   981
wenzelm@35351
   982
* Type constructors admit general mixfix syntax, not just infix.
wenzelm@35351
   983
wenzelm@36508
   984
* Concrete syntax may be attached to local entities without a proof
wenzelm@36508
   985
body, too.  This works via regular mixfix annotations for 'fix',
wenzelm@36508
   986
'def', 'obtain' etc. or via the explicit 'write' command, which is
wenzelm@36508
   987
similar to the 'notation' command in theory specifications.
wenzelm@36508
   988
wenzelm@37351
   989
* Discontinued unnamed infix syntax (legacy feature for many years) --
wenzelm@37351
   990
need to specify constant name and syntax separately.  Internal ML
wenzelm@37351
   991
datatype constructors have been renamed from InfixName to Infix etc.
wenzelm@37351
   992
Minor INCOMPATIBILITY.
wenzelm@37351
   993
wenzelm@37351
   994
* Schematic theorem statements need to be explicitly markup as such,
wenzelm@37351
   995
via commands 'schematic_lemma', 'schematic_theorem',
wenzelm@37351
   996
'schematic_corollary'.  Thus the relevance of the proof is made
wenzelm@37351
   997
syntactically clear, which impacts performance in a parallel or
wenzelm@37351
   998
asynchronous interactive environment.  Minor INCOMPATIBILITY.
wenzelm@37351
   999
wenzelm@35613
  1000
* Use of cumulative prems via "!" in some proof methods has been
wenzelm@37351
  1001
discontinued (old legacy feature).
wenzelm@35613
  1002
boehmes@35979
  1003
* References 'trace_simp' and 'debug_simp' have been replaced by
wenzelm@36857
  1004
configuration options stored in the context. Enabling tracing (the
wenzelm@36857
  1005
case of debugging is similar) in proofs works via
wenzelm@36857
  1006
wenzelm@36857
  1007
  using [[trace_simp = true]]
wenzelm@36857
  1008
wenzelm@36857
  1009
Tracing is then active for all invocations of the simplifier in
wenzelm@36857
  1010
subsequent goal refinement steps. Tracing may also still be enabled or
wenzelm@40780
  1011
disabled via the ProofGeneral settings menu.
boehmes@35979
  1012
wenzelm@36177
  1013
* Separate commands 'hide_class', 'hide_type', 'hide_const',
wenzelm@36177
  1014
'hide_fact' replace the former 'hide' KIND command.  Minor
wenzelm@36177
  1015
INCOMPATIBILITY.
wenzelm@36177
  1016
wenzelm@37298
  1017
* Improved parallelism of proof term normalization: usedir -p2 -q0 is
wenzelm@37298
  1018
more efficient than combinations with -q1 or -q2.
wenzelm@37298
  1019
wenzelm@35260
  1020
haftmann@34170
  1021
*** Pure ***
haftmann@34170
  1022
wenzelm@37351
  1023
* Proofterms record type-class reasoning explicitly, using the
wenzelm@37351
  1024
"unconstrain" operation internally.  This eliminates all sort
wenzelm@37351
  1025
constraints from a theorem and proof, introducing explicit
wenzelm@37351
  1026
OFCLASS-premises.  On the proof term level, this operation is
wenzelm@37351
  1027
automatically applied at theorem boundaries, such that closed proofs
wenzelm@37351
  1028
are always free of sort constraints.  INCOMPATIBILITY for tools that
wenzelm@37351
  1029
inspect proof terms.
haftmann@36147
  1030
wenzelm@35765
  1031
* Local theory specifications may depend on extra type variables that
wenzelm@35765
  1032
are not present in the result type -- arguments TYPE('a) :: 'a itself
wenzelm@35765
  1033
are added internally.  For example:
wenzelm@35765
  1034
wenzelm@35765
  1035
  definition unitary :: bool where "unitary = (ALL (x::'a) y. x = y)"
wenzelm@35765
  1036
wenzelm@37351
  1037
* Predicates of locales introduced by classes carry a mandatory
wenzelm@37351
  1038
"class" prefix.  INCOMPATIBILITY.
wenzelm@37351
  1039
wenzelm@37351
  1040
* Vacuous class specifications observe default sort.  INCOMPATIBILITY.
wenzelm@37351
  1041
wenzelm@37351
  1042
* Old 'axclass' command has been discontinued.  INCOMPATIBILITY, use
wenzelm@37351
  1043
'class' instead.
wenzelm@37351
  1044
wenzelm@37351
  1045
* Command 'code_reflect' allows to incorporate generated ML code into
wenzelm@37351
  1046
runtime environment; replaces immature code_datatype antiquotation.
wenzelm@37351
  1047
INCOMPATIBILITY.
wenzelm@37351
  1048
wenzelm@37351
  1049
* Code generator: simple concept for abstract datatypes obeying
wenzelm@37351
  1050
invariants.
wenzelm@37351
  1051
wenzelm@36857
  1052
* Code generator: details of internal data cache have no impact on the
wenzelm@36857
  1053
user space functionality any longer.
wenzelm@36857
  1054
wenzelm@37351
  1055
* Methods "unfold_locales" and "intro_locales" ignore non-locale
wenzelm@37351
  1056
subgoals.  This is more appropriate for interpretations with 'where'.
wenzelm@36857
  1057
INCOMPATIBILITY.
haftmann@34170
  1058
wenzelm@36356
  1059
* Command 'example_proof' opens an empty proof body.  This allows to
wenzelm@36356
  1060
experiment with Isar, without producing any persistent result.
wenzelm@36356
  1061
wenzelm@35413
  1062
* Commands 'type_notation' and 'no_type_notation' declare type syntax
wenzelm@35413
  1063
within a local theory context, with explicit checking of the
wenzelm@35413
  1064
constructors involved (in contrast to the raw 'syntax' versions).
wenzelm@35413
  1065
wenzelm@36178
  1066
* Commands 'types' and 'typedecl' now work within a local theory
wenzelm@36178
  1067
context -- without introducing dependencies on parameters or
wenzelm@36178
  1068
assumptions, which is not possible in Isabelle/Pure.
wenzelm@35681
  1069
wenzelm@36857
  1070
* Command 'defaultsort' has been renamed to 'default_sort', it works
wenzelm@36857
  1071
within a local theory context.  Minor INCOMPATIBILITY.
wenzelm@36454
  1072
haftmann@34170
  1073
haftmann@33993
  1074
*** HOL ***
haftmann@33993
  1075
wenzelm@37351
  1076
* Command 'typedef' now works within a local theory context -- without
wenzelm@37351
  1077
introducing dependencies on parameters or assumptions, which is not
wenzelm@37351
  1078
possible in Isabelle/Pure/HOL.  Note that the logical environment may
wenzelm@37351
  1079
contain multiple interpretations of local typedefs (with different
wenzelm@37351
  1080
non-emptiness proofs), even in a global theory context.
wenzelm@37351
  1081
wenzelm@37351
  1082
* New package for quotient types.  Commands 'quotient_type' and
wenzelm@37351
  1083
'quotient_definition' may be used for defining types and constants by
wenzelm@37351
  1084
quotient constructions.  An example is the type of integers created by
wenzelm@37351
  1085
quotienting pairs of natural numbers:
wenzelm@37380
  1086
wenzelm@37351
  1087
  fun
wenzelm@37380
  1088
    intrel :: "(nat * nat) => (nat * nat) => bool"
wenzelm@37351
  1089
  where
wenzelm@37351
  1090
    "intrel (x, y) (u, v) = (x + v = u + y)"
wenzelm@37351
  1091
wenzelm@37380
  1092
  quotient_type int = "nat * nat" / intrel
wenzelm@37351
  1093
    by (auto simp add: equivp_def expand_fun_eq)
wenzelm@37380
  1094
wenzelm@37351
  1095
  quotient_definition
wenzelm@37351
  1096
    "0::int" is "(0::nat, 0::nat)"
wenzelm@37351
  1097
wenzelm@37351
  1098
The method "lifting" can be used to lift of theorems from the
wenzelm@37351
  1099
underlying "raw" type to the quotient type.  The example
wenzelm@37351
  1100
src/HOL/Quotient_Examples/FSet.thy includes such a quotient
wenzelm@37351
  1101
construction and provides a reasoning infrastructure for finite sets.
wenzelm@37351
  1102
wenzelm@37351
  1103
* Renamed Library/Quotient.thy to Library/Quotient_Type.thy to avoid
wenzelm@37351
  1104
clash with new theory Quotient in Main HOL.
wenzelm@37351
  1105
wenzelm@37351
  1106
* Moved the SMT binding into the main HOL session, eliminating
wenzelm@37351
  1107
separate HOL-SMT session.
wenzelm@37351
  1108
haftmann@37020
  1109
* List membership infix mem operation is only an input abbreviation.
haftmann@37020
  1110
INCOMPATIBILITY.
haftmann@37020
  1111
wenzelm@37144
  1112
* Theory Library/Word.thy has been removed.  Use library Word/Word.thy
wenzelm@37144
  1113
for future developements; former Library/Word.thy is still present in
wenzelm@37144
  1114
the AFP entry RSAPPS.
haftmann@36963
  1115
wenzelm@36857
  1116
* Theorem Int.int_induct renamed to Int.int_of_nat_induct and is no
wenzelm@36857
  1117
longer shadowed.  INCOMPATIBILITY.
haftmann@36808
  1118
huffman@36836
  1119
* Dropped theorem duplicate comp_arith; use semiring_norm instead.
huffman@36836
  1120
INCOMPATIBILITY.
huffman@36836
  1121
huffman@36836
  1122
* Dropped theorem RealPow.real_sq_order; use power2_le_imp_le instead.
huffman@36836
  1123
INCOMPATIBILITY.
haftmann@36714
  1124
wenzelm@36857
  1125
* Dropped normalizing_semiring etc; use the facts in semiring classes
wenzelm@36857
  1126
instead.  INCOMPATIBILITY.
wenzelm@36857
  1127
huffman@36979
  1128
* Dropped several real-specific versions of lemmas about floor and
wenzelm@37351
  1129
ceiling; use the generic lemmas from theory "Archimedean_Field"
wenzelm@37351
  1130
instead.  INCOMPATIBILITY.
huffman@36979
  1131
huffman@36979
  1132
  floor_number_of_eq         ~> floor_number_of
huffman@36979
  1133
  le_floor_eq_number_of      ~> number_of_le_floor
huffman@36979
  1134
  le_floor_eq_zero           ~> zero_le_floor
huffman@36979
  1135
  le_floor_eq_one            ~> one_le_floor
huffman@36979
  1136
  floor_less_eq_number_of    ~> floor_less_number_of
huffman@36979
  1137
  floor_less_eq_zero         ~> floor_less_zero
huffman@36979
  1138
  floor_less_eq_one          ~> floor_less_one
huffman@36979
  1139
  less_floor_eq_number_of    ~> number_of_less_floor
huffman@36979
  1140
  less_floor_eq_zero         ~> zero_less_floor
huffman@36979
  1141
  less_floor_eq_one          ~> one_less_floor
huffman@36979
  1142
  floor_le_eq_number_of      ~> floor_le_number_of
huffman@36979
  1143
  floor_le_eq_zero           ~> floor_le_zero
huffman@36979
  1144
  floor_le_eq_one            ~> floor_le_one
huffman@36979
  1145
  floor_subtract_number_of   ~> floor_diff_number_of
huffman@36979
  1146
  floor_subtract_one         ~> floor_diff_one
huffman@36979
  1147
  ceiling_number_of_eq       ~> ceiling_number_of
huffman@36979
  1148
  ceiling_le_eq_number_of    ~> ceiling_le_number_of
huffman@36979
  1149
  ceiling_le_zero_eq         ~> ceiling_le_zero
huffman@36979
  1150
  ceiling_le_eq_one          ~> ceiling_le_one
huffman@36979
  1151
  less_ceiling_eq_number_of  ~> number_of_less_ceiling
huffman@36979
  1152
  less_ceiling_eq_zero       ~> zero_less_ceiling
huffman@36979
  1153
  less_ceiling_eq_one        ~> one_less_ceiling
huffman@36979
  1154
  ceiling_less_eq_number_of  ~> ceiling_less_number_of
huffman@36979
  1155
  ceiling_less_eq_zero       ~> ceiling_less_zero
huffman@36979
  1156
  ceiling_less_eq_one        ~> ceiling_less_one
huffman@36979
  1157
  le_ceiling_eq_number_of    ~> number_of_le_ceiling
huffman@36979
  1158
  le_ceiling_eq_zero         ~> zero_le_ceiling
huffman@36979
  1159
  le_ceiling_eq_one          ~> one_le_ceiling
huffman@36979
  1160
  ceiling_subtract_number_of ~> ceiling_diff_number_of
huffman@36979
  1161
  ceiling_subtract_one       ~> ceiling_diff_one
huffman@36979
  1162
wenzelm@37144
  1163
* Theory "Finite_Set": various folding_XXX locales facilitate the
wenzelm@36857
  1164
application of the various fold combinators on finite sets.
wenzelm@36857
  1165
wenzelm@36857
  1166
* Library theory "RBT" renamed to "RBT_Impl"; new library theory "RBT"
wenzelm@36857
  1167
provides abstract red-black tree type which is backed by "RBT_Impl" as
wenzelm@36857
  1168
implementation.  INCOMPATIBILTY.
haftmann@36147
  1169
huffman@36830
  1170
* Theory Library/Coinductive_List has been removed -- superseded by
wenzelm@35763
  1171
AFP/thys/Coinductive.
wenzelm@35763
  1172
huffman@36829
  1173
* Theory PReal, including the type "preal" and related operations, has
huffman@36829
  1174
been removed.  INCOMPATIBILITY.
huffman@36829
  1175
wenzelm@37380
  1176
* Real: new development using Cauchy Sequences.
wenzelm@37380
  1177
wenzelm@37351
  1178
* Split off theory "Big_Operators" containing setsum, setprod,
wenzelm@37351
  1179
Inf_fin, Sup_fin, Min, Max from theory Finite_Set.  INCOMPATIBILITY.
wenzelm@36857
  1180
wenzelm@36857
  1181
* Theory "Rational" renamed to "Rat", for consistency with "Nat",
wenzelm@36857
  1182
"Int" etc.  INCOMPATIBILITY.
wenzelm@36857
  1183
wenzelm@37351
  1184
* Constant Rat.normalize needs to be qualified.  INCOMPATIBILITY.
wenzelm@37143
  1185
wenzelm@36857
  1186
* New set of rules "ac_simps" provides combined assoc / commute
wenzelm@36857
  1187
rewrites for all interpretations of the appropriate generic locales.
wenzelm@36857
  1188
wenzelm@36857
  1189
* Renamed theory "OrderedGroup" to "Groups" and split theory
wenzelm@36857
  1190
"Ring_and_Field" into theories "Rings" and "Fields"; for more
wenzelm@36857
  1191
appropriate and more consistent names suitable for name prefixes
wenzelm@36857
  1192
within the HOL theories.  INCOMPATIBILITY.
haftmann@35050
  1193
haftmann@35084
  1194
* Some generic constants have been put to appropriate theories:
wenzelm@36857
  1195
  - less_eq, less: Orderings
wenzelm@36857
  1196
  - zero, one, plus, minus, uminus, times, abs, sgn: Groups
wenzelm@36857
  1197
  - inverse, divide: Rings
haftmann@35084
  1198
INCOMPATIBILITY.
haftmann@35084
  1199
wenzelm@36857
  1200
* More consistent naming of type classes involving orderings (and
wenzelm@36857
  1201
lattices):
haftmann@35027
  1202
haftmann@35027
  1203
    lower_semilattice                   ~> semilattice_inf
haftmann@35027
  1204
    upper_semilattice                   ~> semilattice_sup
haftmann@35027
  1205
haftmann@35027
  1206
    dense_linear_order                  ~> dense_linorder
haftmann@35027
  1207
haftmann@35027
  1208
    pordered_ab_group_add               ~> ordered_ab_group_add
haftmann@35027
  1209
    pordered_ab_group_add_abs           ~> ordered_ab_group_add_abs
haftmann@35027
  1210
    pordered_ab_semigroup_add           ~> ordered_ab_semigroup_add
haftmann@35027
  1211
    pordered_ab_semigroup_add_imp_le    ~> ordered_ab_semigroup_add_imp_le
haftmann@35027
  1212
    pordered_cancel_ab_semigroup_add    ~> ordered_cancel_ab_semigroup_add
haftmann@35027
  1213
    pordered_cancel_comm_semiring       ~> ordered_cancel_comm_semiring
haftmann@35027
  1214
    pordered_cancel_semiring            ~> ordered_cancel_semiring
haftmann@35027
  1215
    pordered_comm_monoid_add            ~> ordered_comm_monoid_add
haftmann@35027
  1216
    pordered_comm_ring                  ~> ordered_comm_ring
haftmann@35027
  1217
    pordered_comm_semiring              ~> ordered_comm_semiring
haftmann@35027
  1218
    pordered_ring                       ~> ordered_ring
haftmann@35027
  1219
    pordered_ring_abs                   ~> ordered_ring_abs
haftmann@35027
  1220
    pordered_semiring                   ~> ordered_semiring
haftmann@35027
  1221
haftmann@35027
  1222
    ordered_ab_group_add                ~> linordered_ab_group_add
haftmann@35027
  1223
    ordered_ab_semigroup_add            ~> linordered_ab_semigroup_add
haftmann@35027
  1224
    ordered_cancel_ab_semigroup_add     ~> linordered_cancel_ab_semigroup_add
haftmann@35027
  1225
    ordered_comm_semiring_strict        ~> linordered_comm_semiring_strict
haftmann@35027
  1226
    ordered_field                       ~> linordered_field
haftmann@35027
  1227
    ordered_field_no_lb                 ~> linordered_field_no_lb
haftmann@35027
  1228
    ordered_field_no_ub                 ~> linordered_field_no_ub
haftmann@35027
  1229
    ordered_field_dense_linear_order    ~> dense_linordered_field
haftmann@35027
  1230
    ordered_idom                        ~> linordered_idom
haftmann@35027
  1231
    ordered_ring                        ~> linordered_ring
haftmann@35027
  1232
    ordered_ring_le_cancel_factor       ~> linordered_ring_le_cancel_factor
haftmann@35027
  1233
    ordered_ring_less_cancel_factor     ~> linordered_ring_less_cancel_factor
haftmann@35027
  1234
    ordered_ring_strict                 ~> linordered_ring_strict
haftmann@35027
  1235
    ordered_semidom                     ~> linordered_semidom
haftmann@35027
  1236
    ordered_semiring                    ~> linordered_semiring
haftmann@35027
  1237
    ordered_semiring_1                  ~> linordered_semiring_1
haftmann@35027
  1238
    ordered_semiring_1_strict           ~> linordered_semiring_1_strict
haftmann@35027
  1239
    ordered_semiring_strict             ~> linordered_semiring_strict
haftmann@35027
  1240
wenzelm@36857
  1241
  The following slightly odd type classes have been moved to a
wenzelm@37351
  1242
  separate theory Library/Lattice_Algebras:
haftmann@35032
  1243
haftmann@35032
  1244
    lordered_ab_group_add               ~> lattice_ab_group_add
haftmann@35032
  1245
    lordered_ab_group_add_abs           ~> lattice_ab_group_add_abs
haftmann@35032
  1246
    lordered_ab_group_add_meet          ~> semilattice_inf_ab_group_add
haftmann@35032
  1247
    lordered_ab_group_add_join          ~> semilattice_sup_ab_group_add
haftmann@35032
  1248
    lordered_ring                       ~> lattice_ring
haftmann@35032
  1249
haftmann@35027
  1250
INCOMPATIBILITY.
haftmann@35027
  1251
haftmann@36416
  1252
* Refined field classes:
wenzelm@36857
  1253
  - classes division_ring_inverse_zero, field_inverse_zero,
wenzelm@36857
  1254
    linordered_field_inverse_zero include rule inverse 0 = 0 --
wenzelm@36857
  1255
    subsumes former division_by_zero class;
wenzelm@36857
  1256
  - numerous lemmas have been ported from field to division_ring.
wenzelm@36857
  1257
INCOMPATIBILITY.
haftmann@36416
  1258
haftmann@36416
  1259
* Refined algebra theorem collections:
wenzelm@36857
  1260
  - dropped theorem group group_simps, use algebra_simps instead;
wenzelm@36857
  1261
  - dropped theorem group ring_simps, use field_simps instead;
wenzelm@36857
  1262
  - proper theorem collection field_simps subsumes former theorem
wenzelm@36857
  1263
    groups field_eq_simps and field_simps;
wenzelm@36857
  1264
  - dropped lemma eq_minus_self_iff which is a duplicate for
wenzelm@36857
  1265
    equal_neg_zero.
wenzelm@36857
  1266
INCOMPATIBILITY.
wenzelm@35009
  1267
wenzelm@35009
  1268
* Theory Finite_Set and List: some lemmas have been generalized from
wenzelm@34076
  1269
sets to lattices:
wenzelm@34076
  1270
haftmann@34007
  1271
  fun_left_comm_idem_inter      ~> fun_left_comm_idem_inf
haftmann@34007
  1272
  fun_left_comm_idem_union      ~> fun_left_comm_idem_sup
haftmann@34007
  1273
  inter_Inter_fold_inter        ~> inf_Inf_fold_inf
haftmann@34007
  1274
  union_Union_fold_union        ~> sup_Sup_fold_sup
haftmann@34007
  1275
  Inter_fold_inter              ~> Inf_fold_inf
haftmann@34007
  1276
  Union_fold_union              ~> Sup_fold_sup
haftmann@34007
  1277
  inter_INTER_fold_inter        ~> inf_INFI_fold_inf
haftmann@34007
  1278
  union_UNION_fold_union        ~> sup_SUPR_fold_sup
haftmann@34007
  1279
  INTER_fold_inter              ~> INFI_fold_inf
haftmann@34007
  1280
  UNION_fold_union              ~> SUPR_fold_sup
haftmann@34007
  1281
wenzelm@37351
  1282
* Theory "Complete_Lattice": lemmas top_def and bot_def have been
haftmann@36416
  1283
replaced by the more convenient lemmas Inf_empty and Sup_empty.
haftmann@36416
  1284
Dropped lemmas Inf_insert_simp and Sup_insert_simp, which are subsumed
haftmann@36416
  1285
by Inf_insert and Sup_insert.  Lemmas Inf_UNIV and Sup_UNIV replace
haftmann@36416
  1286
former Inf_Univ and Sup_Univ.  Lemmas inf_top_right and sup_bot_right
haftmann@36416
  1287
subsume inf_top and sup_bot respectively.  INCOMPATIBILITY.
haftmann@36416
  1288
wenzelm@36857
  1289
* Reorganized theory Multiset: swapped notation of pointwise and
wenzelm@36857
  1290
multiset order:
wenzelm@37351
  1291
wenzelm@36857
  1292
  - pointwise ordering is instance of class order with standard syntax
wenzelm@36857
  1293
    <= and <;
wenzelm@36857
  1294
  - multiset ordering has syntax <=# and <#; partial order properties
wenzelm@36857
  1295
    are provided by means of interpretation with prefix
wenzelm@36857
  1296
    multiset_order;
wenzelm@36857
  1297
  - less duplication, less historical organization of sections,
wenzelm@36857
  1298
    conversion from associations lists to multisets, rudimentary code
wenzelm@36857
  1299
    generation;
wenzelm@36857
  1300
  - use insert_DiffM2 [symmetric] instead of elem_imp_eq_diff_union,
wenzelm@36857
  1301
    if needed.
wenzelm@37351
  1302
nipkow@36903
  1303
Renamed:
wenzelm@37351
  1304
wenzelm@37351
  1305
  multiset_eq_conv_count_eq  ~>  multiset_ext_iff
wenzelm@37351
  1306
  multi_count_ext  ~>  multiset_ext
wenzelm@37351
  1307
  diff_union_inverse2  ~>  diff_union_cancelR
wenzelm@37351
  1308
wenzelm@36857
  1309
INCOMPATIBILITY.
haftmann@36416
  1310
nipkow@36903
  1311
* Theory Permutation: replaced local "remove" by List.remove1.
nipkow@36903
  1312
haftmann@36416
  1313
* Code generation: ML and OCaml code is decorated with signatures.
haftmann@36416
  1314
wenzelm@35009
  1315
* Theory List: added transpose.
wenzelm@35009
  1316
huffman@35810
  1317
* Library/Nat_Bijection.thy is a collection of bijective functions
huffman@35810
  1318
between nat and other types, which supersedes the older libraries
huffman@35810
  1319
Library/Nat_Int_Bij.thy and HOLCF/NatIso.thy.  INCOMPATIBILITY.
huffman@35810
  1320
huffman@35810
  1321
  Constants:
huffman@35810
  1322
  Nat_Int_Bij.nat2_to_nat         ~> prod_encode
huffman@35810
  1323
  Nat_Int_Bij.nat_to_nat2         ~> prod_decode
huffman@35810
  1324
  Nat_Int_Bij.int_to_nat_bij      ~> int_encode
huffman@35810
  1325
  Nat_Int_Bij.nat_to_int_bij      ~> int_decode
huffman@35810
  1326
  Countable.pair_encode           ~> prod_encode
huffman@35810
  1327
  NatIso.prod2nat                 ~> prod_encode
huffman@35810
  1328
  NatIso.nat2prod                 ~> prod_decode
huffman@35810
  1329
  NatIso.sum2nat                  ~> sum_encode
huffman@35810
  1330
  NatIso.nat2sum                  ~> sum_decode
huffman@35810
  1331
  NatIso.list2nat                 ~> list_encode
huffman@35810
  1332
  NatIso.nat2list                 ~> list_decode
huffman@35810
  1333
  NatIso.set2nat                  ~> set_encode
huffman@35810
  1334
  NatIso.nat2set                  ~> set_decode
huffman@35810
  1335
huffman@35810
  1336
  Lemmas:
huffman@35810
  1337
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_decode
huffman@35810
  1338
  Nat_Int_Bij.nat2_to_nat_inj     ~> inj_prod_encode
huffman@35810
  1339
  Nat_Int_Bij.nat2_to_nat_surj    ~> surj_prod_encode
huffman@35810
  1340
  Nat_Int_Bij.nat_to_nat2_inj     ~> inj_prod_decode
huffman@35810
  1341
  Nat_Int_Bij.nat_to_nat2_surj    ~> surj_prod_decode
huffman@35810
  1342
  Nat_Int_Bij.i2n_n2i_id          ~> int_encode_inverse
huffman@35810
  1343
  Nat_Int_Bij.n2i_i2n_id          ~> int_decode_inverse
huffman@35810
  1344
  Nat_Int_Bij.surj_nat_to_int_bij ~> surj_int_encode
huffman@35810
  1345
  Nat_Int_Bij.surj_int_to_nat_bij ~> surj_int_decode
huffman@35810
  1346
  Nat_Int_Bij.inj_nat_to_int_bij  ~> inj_int_encode
huffman@35810
  1347
  Nat_Int_Bij.inj_int_to_nat_bij  ~> inj_int_decode
huffman@35810
  1348
  Nat_Int_Bij.bij_nat_to_int_bij  ~> bij_int_encode
huffman@35810
  1349
  Nat_Int_Bij.bij_int_to_nat_bij  ~> bij_int_decode
huffman@35810
  1350
blanchet@36929
  1351
* Sledgehammer:
blanchet@36929
  1352
  - Renamed ATP commands:
blanchet@36929
  1353
    atp_info     ~> sledgehammer running_atps
blanchet@36929
  1354
    atp_kill     ~> sledgehammer kill_atps
blanchet@36929
  1355
    atp_messages ~> sledgehammer messages
blanchet@36929
  1356
    atp_minimize ~> sledgehammer minimize
blanchet@36929
  1357
    print_atps   ~> sledgehammer available_atps
blanchet@36929
  1358
    INCOMPATIBILITY.
blanchet@36929
  1359
  - Added user's manual ("isabelle doc sledgehammer").
blanchet@36929
  1360
  - Added option syntax and "sledgehammer_params" to customize
blanchet@36929
  1361
    Sledgehammer's behavior.  See the manual for details.
blanchet@36929
  1362
  - Modified the Isar proof reconstruction code so that it produces
blanchet@36929
  1363
    direct proofs rather than proofs by contradiction.  (This feature
blanchet@36929
  1364
    is still experimental.)
blanchet@36929
  1365
  - Made Isar proof reconstruction work for SPASS, remote ATPs, and in
blanchet@36929
  1366
    full-typed mode.
blanchet@36929
  1367
  - Added support for TPTP syntax for SPASS via the "spass_tptp" ATP.
blanchet@36929
  1368
blanchet@36928
  1369
* Nitpick:
blanchet@36928
  1370
  - Added and implemented "binary_ints" and "bits" options.
blanchet@36928
  1371
  - Added "std" option and implemented support for nonstandard models.
blanchet@36928
  1372
  - Added and implemented "finitize" option to improve the precision
blanchet@36928
  1373
    of infinite datatypes based on a monotonicity analysis.
blanchet@36928
  1374
  - Added support for quotient types.
blanchet@36928
  1375
  - Added support for "specification" and "ax_specification"
blanchet@36928
  1376
    constructs.
blanchet@36928
  1377
  - Added support for local definitions (for "function" and
blanchet@36928
  1378
    "termination" proofs).
blanchet@36928
  1379
  - Added support for term postprocessors.
blanchet@36928
  1380
  - Optimized "Multiset.multiset" and "FinFun.finfun".
blanchet@36928
  1381
  - Improved efficiency of "destroy_constrs" optimization.
blanchet@36928
  1382
  - Fixed soundness bugs related to "destroy_constrs" optimization and
blanchet@36928
  1383
    record getters.
blanchet@37272
  1384
  - Fixed soundness bug related to higher-order constructors.
blanchet@37272
  1385
  - Fixed soundness bug when "full_descrs" is enabled.
blanchet@36928
  1386
  - Improved precision of set constructs.
blanchet@37260
  1387
  - Added "atoms" option.
blanchet@36928
  1388
  - Added cache to speed up repeated Kodkod invocations on the same
blanchet@36928
  1389
    problems.
blanchet@36928
  1390
  - Renamed "MiniSatJNI", "zChaffJNI", "BerkMinAlloy", and
blanchet@36928
  1391
    "SAT4JLight" to "MiniSat_JNI", "zChaff_JNI", "BerkMin_Alloy", and
blanchet@36928
  1392
    "SAT4J_Light".  INCOMPATIBILITY.
blanchet@36928
  1393
  - Removed "skolemize", "uncurry", "sym_break", "flatten_prop",
blanchet@36928
  1394
    "sharing_depth", and "show_skolems" options.  INCOMPATIBILITY.
blanchet@37264
  1395
  - Removed "nitpick_intro" attribute.  INCOMPATIBILITY.
blanchet@36928
  1396
berghofe@37361
  1397
* Method "induct" now takes instantiations of the form t, where t is not
berghofe@37361
  1398
  a variable, as a shorthand for "x == t", where x is a fresh variable.
berghofe@37361
  1399
  If this is not intended, t has to be enclosed in parentheses.
berghofe@37361
  1400
  By default, the equalities generated by definitional instantiations
berghofe@37361
  1401
  are pre-simplified, which may cause parameters of inductive cases
berghofe@37361
  1402
  to disappear, or may even delete some of the inductive cases.
berghofe@37361
  1403
  Use "induct (no_simp)" instead of "induct" to restore the old
berghofe@37361
  1404
  behaviour. The (no_simp) option is also understood by the "cases"
berghofe@37361
  1405
  and "nominal_induct" methods, which now perform pre-simplification, too.
berghofe@37361
  1406
  INCOMPATIBILITY.
berghofe@37361
  1407
haftmann@33993
  1408
huffman@36828
  1409
*** HOLCF ***
huffman@36828
  1410
huffman@36828
  1411
* Variable names in lemmas generated by the domain package have
huffman@36828
  1412
changed; the naming scheme is now consistent with the HOL datatype
huffman@36828
  1413
package.  Some proof scripts may be affected, INCOMPATIBILITY.
huffman@36828
  1414
huffman@36828
  1415
* The domain package no longer defines the function "foo_copy" for
huffman@36828
  1416
recursive domain "foo".  The reach lemma is now stated directly in
huffman@36828
  1417
terms of "foo_take".  Lemmas and proofs that mention "foo_copy" must
huffman@36828
  1418
be reformulated in terms of "foo_take", INCOMPATIBILITY.
huffman@36828
  1419
huffman@36828
  1420
* Most definedness lemmas generated by the domain package (previously
huffman@36828
  1421
of the form "x ~= UU ==> foo$x ~= UU") now have an if-and-only-if form
huffman@36828
  1422
like "foo$x = UU <-> x = UU", which works better as a simp rule.
wenzelm@37351
  1423
Proofs that used definedness lemmas as intro rules may break,
huffman@36828
  1424
potential INCOMPATIBILITY.
huffman@36828
  1425
huffman@36828
  1426
* Induction and casedist rules generated by the domain package now
huffman@36828
  1427
declare proper case_names (one called "bottom", and one named for each
huffman@36828
  1428
constructor).  INCOMPATIBILITY.
huffman@36828
  1429
huffman@36828
  1430
* For mutually-recursive domains, separate "reach" and "take_lemma"
huffman@36828
  1431
rules are generated for each domain, INCOMPATIBILITY.
huffman@36828
  1432
huffman@36828
  1433
  foo_bar.reach       ~> foo.reach  bar.reach
huffman@36828
  1434
  foo_bar.take_lemmas ~> foo.take_lemma  bar.take_lemma
huffman@36828
  1435
huffman@36828
  1436
* Some lemmas generated by the domain package have been renamed for
huffman@36828
  1437
consistency with the datatype package, INCOMPATIBILITY.
huffman@36828
  1438
huffman@36828
  1439
  foo.ind        ~> foo.induct
huffman@36828
  1440
  foo.finite_ind ~> foo.finite_induct
huffman@36828
  1441
  foo.coind      ~> foo.coinduct
huffman@36828
  1442
  foo.casedist   ~> foo.exhaust
huffman@36828
  1443
  foo.exhaust    ~> foo.nchotomy
huffman@36828
  1444
huffman@36828
  1445
* For consistency with other definition packages, the fixrec package
huffman@36828
  1446
now generates qualified theorem names, INCOMPATIBILITY.
huffman@36828
  1447
huffman@36828
  1448
  foo_simps  ~> foo.simps
huffman@36828
  1449
  foo_unfold ~> foo.unfold
huffman@36828
  1450
  foo_induct ~> foo.induct
huffman@36828
  1451
huffman@37087
  1452
* The "fixrec_simp" attribute has been removed.  The "fixrec_simp"
huffman@37087
  1453
method and internal fixrec proofs now use the default simpset instead.
huffman@37087
  1454
INCOMPATIBILITY.
huffman@37087
  1455
huffman@36828
  1456
* The "contlub" predicate has been removed.  Proof scripts should use
huffman@36828
  1457
lemma contI2 in place of monocontlub2cont, INCOMPATIBILITY.
huffman@36828
  1458
huffman@36828
  1459
* The "admw" predicate has been removed, INCOMPATIBILITY.
huffman@36828
  1460
huffman@36828
  1461
* The constants cpair, cfst, and csnd have been removed in favor of
huffman@36828
  1462
Pair, fst, and snd from Isabelle/HOL, INCOMPATIBILITY.
huffman@36828
  1463
huffman@36828
  1464
haftmann@33993
  1465
*** ML ***
haftmann@33993
  1466
wenzelm@37351
  1467
* Antiquotations for basic formal entities:
wenzelm@37351
  1468
wenzelm@37351
  1469
    @{class NAME}         -- type class
wenzelm@37351
  1470
    @{class_syntax NAME}  -- syntax representation of the above
wenzelm@37351
  1471
wenzelm@37351
  1472
    @{type_name NAME}     -- logical type
wenzelm@37351
  1473
    @{type_abbrev NAME}   -- type abbreviation
wenzelm@37351
  1474
    @{nonterminal NAME}   -- type of concrete syntactic category
wenzelm@37351
  1475
    @{type_syntax NAME}   -- syntax representation of any of the above
wenzelm@37351
  1476
wenzelm@37351
  1477
    @{const_name NAME}    -- logical constant (INCOMPATIBILITY)
wenzelm@37351
  1478
    @{const_abbrev NAME}  -- abbreviated constant
wenzelm@37351
  1479
    @{const_syntax NAME}  -- syntax representation of any of the above
wenzelm@37351
  1480
wenzelm@37351
  1481
* Antiquotation @{syntax_const NAME} ensures that NAME refers to a raw
wenzelm@37351
  1482
syntax constant (cf. 'syntax' command).
wenzelm@37351
  1483
wenzelm@37351
  1484
* Antiquotation @{make_string} inlines a function to print arbitrary
wenzelm@37351
  1485
values similar to the ML toplevel.  The result is compiler dependent
wenzelm@37351
  1486
and may fall back on "?" in certain situations.
wenzelm@37351
  1487
wenzelm@37351
  1488
* Diagnostic commands 'ML_val' and 'ML_command' may refer to
wenzelm@37351
  1489
antiquotations @{Isar.state} and @{Isar.goal}.  This replaces impure
wenzelm@37351
  1490
Isar.state() and Isar.goal(), which belong to the old TTY loop and do
wenzelm@37351
  1491
not work with the asynchronous Isar document model.
wenzelm@37351
  1492
wenzelm@37351
  1493
* Configuration options now admit dynamic default values, depending on
wenzelm@37351
  1494
the context or even global references.
wenzelm@37351
  1495
wenzelm@37351
  1496
* SHA1.digest digests strings according to SHA-1 (see RFC 3174).  It
wenzelm@37351
  1497
uses an efficient external library if available (for Poly/ML).
wenzelm@37351
  1498
wenzelm@37144
  1499
* Renamed some important ML structures, while keeping the old names
wenzelm@37144
  1500
for some time as aliases within the structure Legacy:
wenzelm@37144
  1501
wenzelm@37144
  1502
  OuterKeyword  ~>  Keyword
wenzelm@37144
  1503
  OuterLex      ~>  Token
wenzelm@37144
  1504
  OuterParse    ~>  Parse
wenzelm@37144
  1505
  OuterSyntax   ~>  Outer_Syntax
wenzelm@37216
  1506
  PrintMode     ~>  Print_Mode
wenzelm@37144
  1507
  SpecParse     ~>  Parse_Spec
wenzelm@37216
  1508
  ThyInfo       ~>  Thy_Info
wenzelm@37216
  1509
  ThyLoad       ~>  Thy_Load
wenzelm@37216
  1510
  ThyOutput     ~>  Thy_Output
wenzelm@37145
  1511
  TypeInfer     ~>  Type_Infer
wenzelm@37144
  1512
wenzelm@37144
  1513
Note that "open Legacy" simplifies porting of sources, but forgetting
wenzelm@37144
  1514
to remove it again will complicate porting again in the future.
wenzelm@37144
  1515
wenzelm@37144
  1516
* Most operations that refer to a global context are named
wenzelm@37144
  1517
accordingly, e.g. Simplifier.global_context or
wenzelm@37144
  1518
ProofContext.init_global.  There are some situations where a global
wenzelm@37144
  1519
context actually works, but under normal circumstances one needs to
wenzelm@37144
  1520
pass the proper local context through the code!
wenzelm@37144
  1521
wenzelm@37144
  1522
* Discontinued old TheoryDataFun with its copy/init operation -- data
wenzelm@37144
  1523
needs to be pure.  Functor Theory_Data_PP retains the traditional
wenzelm@37144
  1524
Pretty.pp argument to merge, which is absent in the standard
wenzelm@37144
  1525
Theory_Data version.
wenzelm@36429
  1526
wenzelm@37144
  1527
* Sorts.certify_sort and derived "cert" operations for types and terms
wenzelm@37144
  1528
no longer minimize sorts.  Thus certification at the boundary of the
wenzelm@37144
  1529
inference kernel becomes invariant under addition of class relations,
wenzelm@37144
  1530
which is an important monotonicity principle.  Sorts are now minimized
wenzelm@37144
  1531
in the syntax layer only, at the boundary between the end-user and the
wenzelm@37144
  1532
system.  Subtle INCOMPATIBILITY, may have to use Sign.minimize_sort
wenzelm@37144
  1533
explicitly in rare situations.
wenzelm@37144
  1534
wenzelm@35021
  1535
* Renamed old-style Drule.standard to Drule.export_without_context, to
wenzelm@35021
  1536
emphasize that this is in no way a standard operation.
wenzelm@35021
  1537
INCOMPATIBILITY.
wenzelm@35021
  1538
wenzelm@34076
  1539
* Subgoal.FOCUS (and variants): resulting goal state is normalized as
wenzelm@34076
  1540
usual for resolution.  Rare INCOMPATIBILITY.
wenzelm@34076
  1541
wenzelm@35845
  1542
* Renamed varify/unvarify operations to varify_global/unvarify_global
wenzelm@35845
  1543
to emphasize that these only work in a global situation (which is
wenzelm@35845
  1544
quite rare).
wenzelm@35845
  1545
wenzelm@37144
  1546
* Curried take and drop in library.ML; negative length is interpreted
wenzelm@37144
  1547
as infinity (as in chop).  Subtle INCOMPATIBILITY.
wenzelm@36961
  1548
wenzelm@37351
  1549
* Proof terms: type substitutions on proof constants now use canonical
wenzelm@37351
  1550
order of type variables.  INCOMPATIBILITY for tools working with proof
wenzelm@37351
  1551
terms.
wenzelm@37351
  1552
wenzelm@37351
  1553
* Raw axioms/defs may no longer carry sort constraints, and raw defs
wenzelm@37351
  1554
may no longer carry premises.  User-level specifications are
wenzelm@37351
  1555
transformed accordingly by Thm.add_axiom/add_def.
wenzelm@37351
  1556
haftmann@33993
  1557
wenzelm@34238
  1558
*** System ***
wenzelm@34238
  1559
wenzelm@34238
  1560
* Discontinued special HOL_USEDIR_OPTIONS for the main HOL image;
wenzelm@34238
  1561
ISABELLE_USEDIR_OPTIONS applies uniformly to all sessions.  Note that
wenzelm@34238
  1562
proof terms are enabled unconditionally in the new HOL-Proofs image.
wenzelm@34238
  1563
wenzelm@34255
  1564
* Discontinued old ISABELLE and ISATOOL environment settings (legacy
wenzelm@34255
  1565
feature since Isabelle2009).  Use ISABELLE_PROCESS and ISABELLE_TOOL,
wenzelm@34255
  1566
respectively.
wenzelm@34255
  1567
wenzelm@36201
  1568
* Old lib/scripts/polyml-platform is superseded by the
wenzelm@36201
  1569
ISABELLE_PLATFORM setting variable, which defaults to the 32 bit
wenzelm@36201
  1570
variant, even on a 64 bit machine.  The following example setting
wenzelm@36201
  1571
prefers 64 bit if available:
wenzelm@36201
  1572
wenzelm@36201
  1573
  ML_PLATFORM="${ISABELLE_PLATFORM64:-$ISABELLE_PLATFORM}"
wenzelm@36201
  1574
wenzelm@37218
  1575
* The preliminary Isabelle/jEdit application demonstrates the emerging
wenzelm@37218
  1576
Isabelle/Scala layer for advanced prover interaction and integration.
wenzelm@37218
  1577
See src/Tools/jEdit or "isabelle jedit" provided by the properly built
wenzelm@37218
  1578
component.
wenzelm@37218
  1579
wenzelm@37375
  1580
* "IsabelleText" is a Unicode font derived from Bitstream Vera Mono
wenzelm@37375
  1581
and Bluesky TeX fonts.  It provides the usual Isabelle symbols,
wenzelm@37375
  1582
similar to the default assignment of the document preparation system
wenzelm@37375
  1583
(cf. isabellesym.sty).  The Isabelle/Scala class Isabelle_System
wenzelm@37375
  1584
provides some operations for direct access to the font without asking
wenzelm@37375
  1585
the user for manual installation.
wenzelm@37375
  1586
wenzelm@34238
  1587
haftmann@33993
  1588
wenzelm@33842
  1589
New in Isabelle2009-1 (December 2009)
wenzelm@33842
  1590
-------------------------------------
wenzelm@30904
  1591
wenzelm@31547
  1592
*** General ***
wenzelm@31547
  1593
wenzelm@31547
  1594
* Discontinued old form of "escaped symbols" such as \\<forall>.  Only
wenzelm@31547
  1595
one backslash should be used, even in ML sources.
wenzelm@31547
  1596
wenzelm@31547
  1597
haftmann@30951
  1598
*** Pure ***
haftmann@30951
  1599
ballarin@32846
  1600
* Locale interpretation propagates mixins along the locale hierarchy.
ballarin@32846
  1601
The currently only available mixins are the equations used to map
ballarin@32846
  1602
local definitions to terms of the target domain of an interpretation.
ballarin@32846
  1603
wenzelm@33842
  1604
* Reactivated diagnostic command 'print_interps'.  Use "print_interps
wenzelm@33842
  1605
loc" to print all interpretations of locale "loc" in the theory.
wenzelm@33842
  1606
Interpretations in proofs are not shown.
ballarin@32846
  1607
ballarin@32983
  1608
* Thoroughly revised locales tutorial.  New section on conditional
ballarin@32983
  1609
interpretation.
ballarin@32983
  1610
wenzelm@33843
  1611
* On instantiation of classes, remaining undefined class parameters
wenzelm@33843
  1612
are formally declared.  INCOMPATIBILITY.
wenzelm@33843
  1613
haftmann@30951
  1614
wenzelm@33842
  1615
*** Document preparation ***
wenzelm@33842
  1616
wenzelm@33842
  1617
* New generalized style concept for printing terms: @{foo (style) ...}
wenzelm@33842
  1618
instead of @{foo_style style ...}  (old form is still retained for
wenzelm@33842
  1619
backward compatibility).  Styles can be also applied for
wenzelm@33842
  1620
antiquotations prop, term_type and typeof.
haftmann@32891
  1621
haftmann@32891
  1622
haftmann@30930
  1623
*** HOL ***
haftmann@30930
  1624
wenzelm@33842
  1625
* New proof method "smt" for a combination of first-order logic with
wenzelm@33842
  1626
equality, linear and nonlinear (natural/integer/real) arithmetic, and
wenzelm@33842
  1627
fixed-size bitvectors; there is also basic support for higher-order
wenzelm@33842
  1628
features (esp. lambda abstractions).  It is an incomplete decision
wenzelm@33842
  1629
procedure based on external SMT solvers using the oracle mechanism;
wenzelm@33842
  1630
for the SMT solver Z3, this method is proof-producing.  Certificates
wenzelm@33842
  1631
are provided to avoid calling the external solvers solely for
wenzelm@33842
  1632
re-checking proofs.  Due to a remote SMT service there is no need for
wenzelm@33842
  1633
installing SMT solvers locally.  See src/HOL/SMT.
wenzelm@33842
  1634
wenzelm@33842
  1635
* New commands to load and prove verification conditions generated by
wenzelm@33842
  1636
the Boogie program verifier or derived systems (e.g. the Verifying C
wenzelm@33842
  1637
Compiler (VCC) or Spec#).  See src/HOL/Boogie.
wenzelm@33842
  1638
wenzelm@33842
  1639
* New counterexample generator tool 'nitpick' based on the Kodkod
wenzelm@33842
  1640
relational model finder.  See src/HOL/Tools/Nitpick and
wenzelm@33842
  1641
src/HOL/Nitpick_Examples.
wenzelm@33842
  1642
haftmann@33860
  1643
* New commands 'code_pred' and 'values' to invoke the predicate
haftmann@33860
  1644
compiler and to enumerate values of inductive predicates.
haftmann@33860
  1645
haftmann@33860
  1646
* A tabled implementation of the reflexive transitive closure.
haftmann@33860
  1647
haftmann@33860
  1648
* New implementation of quickcheck uses generic code generator;
haftmann@33860
  1649
default generators are provided for all suitable HOL types, records
haftmann@33860
  1650
and datatypes.  Old quickcheck can be re-activated importing theory
haftmann@33860
  1651
Library/SML_Quickcheck.
haftmann@33860
  1652
wenzelm@33843
  1653
* New testing tool Mirabelle for automated proof tools.  Applies
wenzelm@33843
  1654
several tools and tactics like sledgehammer, metis, or quickcheck, to
wenzelm@33843
  1655
every proof step in a theory.  To be used in batch mode via the
wenzelm@33843
  1656
"mirabelle" utility.
wenzelm@33843
  1657
wenzelm@33843
  1658
* New proof method "sos" (sum of squares) for nonlinear real
wenzelm@33843
  1659
arithmetic (originally due to John Harison). It requires theory
wenzelm@33843
  1660
Library/Sum_Of_Squares.  It is not a complete decision procedure but
wenzelm@33843
  1661
works well in practice on quantifier-free real arithmetic with +, -,
wenzelm@33843
  1662
*, ^, =, <= and <, i.e. boolean combinations of equalities and
wenzelm@33843
  1663
inequalities between polynomials.  It makes use of external
wenzelm@33843
  1664
semidefinite programming solvers.  Method "sos" generates a
wenzelm@33843
  1665
certificate that can be pasted into the proof thus avoiding the need
wenzelm@33843
  1666
to call an external tool every time the proof is checked.  See
wenzelm@33843
  1667
src/HOL/Library/Sum_Of_Squares.
wenzelm@33843
  1668
wenzelm@33843
  1669
* New method "linarith" invokes existing linear arithmetic decision
wenzelm@33843
  1670
procedure only.
wenzelm@33843
  1671
wenzelm@33843
  1672
* New command 'atp_minimal' reduces result produced by Sledgehammer.
wenzelm@33843
  1673
wenzelm@33843
  1674
* New Sledgehammer option "Full Types" in Proof General settings menu.
wenzelm@33843
  1675
Causes full type information to be output to the ATPs.  This slows
wenzelm@33843
  1676
ATPs down considerably but eliminates a source of unsound "proofs"
wenzelm@33843
  1677
that fail later.
wenzelm@33843
  1678
wenzelm@33843
  1679
* New method "metisFT": A version of metis that uses full type
wenzelm@33843
  1680
information in order to avoid failures of proof reconstruction.
wenzelm@33843
  1681
wenzelm@33843
  1682
* New evaluator "approximate" approximates an real valued term using
wenzelm@33843
  1683
the same method as the approximation method.
wenzelm@33843
  1684
wenzelm@33843
  1685
* Method "approximate" now supports arithmetic expressions as
wenzelm@33843
  1686
boundaries of intervals and implements interval splitting and Taylor
wenzelm@33843
  1687
series expansion.
wenzelm@33843
  1688
wenzelm@33843
  1689
* ML antiquotation @{code_datatype} inserts definition of a datatype
wenzelm@33843
  1690
generated by the code generator; e.g. see src/HOL/Predicate.thy.
wenzelm@33843
  1691
haftmann@33860
  1692
* New theory SupInf of the supremum and infimum operators for sets of
haftmann@33860
  1693
reals.
haftmann@33860
  1694
haftmann@33860
  1695
* New theory Probability, which contains a development of measure
haftmann@33860
  1696
theory, eventually leading to Lebesgue integration and probability.
haftmann@33860
  1697
haftmann@33860
  1698
* Extended Multivariate Analysis to include derivation and Brouwer's
haftmann@33860
  1699
fixpoint theorem.
wenzelm@33843
  1700
wenzelm@33842
  1701
* Reorganization of number theory, INCOMPATIBILITY:
wenzelm@33873
  1702
  - new number theory development for nat and int, in theories Divides
wenzelm@33873
  1703
    and GCD as well as in new session Number_Theory
wenzelm@33873
  1704
  - some constants and facts now suffixed with _nat and _int
wenzelm@33873
  1705
    accordingly
wenzelm@33873
  1706
  - former session NumberTheory now named Old_Number_Theory, including
wenzelm@33873
  1707
    theories Legacy_GCD and Primes (prefer Number_Theory if possible)
wenzelm@33842
  1708
  - moved theory Pocklington from src/HOL/Library to
wenzelm@33842
  1709
    src/HOL/Old_Number_Theory
haftmann@32479
  1710
wenzelm@33873
  1711
* Theory GCD includes functions Gcd/GCD and Lcm/LCM for the gcd and
wenzelm@33873
  1712
lcm of finite and infinite sets. It is shown that they form a complete
haftmann@32600
  1713
lattice.
haftmann@32600
  1714
haftmann@32600
  1715
* Class semiring_div requires superclass no_zero_divisors and proof of
haftmann@32600
  1716
div_mult_mult1; theorems div_mult_mult1, div_mult_mult2,
haftmann@32600
  1717
div_mult_mult1_if, div_mult_mult1 and div_mult_mult2 have been
haftmann@32600
  1718
generalized to class semiring_div, subsuming former theorems
haftmann@32600
  1719
zdiv_zmult_zmult1, zdiv_zmult_zmult1_if, zdiv_zmult_zmult1 and
haftmann@32600
  1720
zdiv_zmult_zmult2.  div_mult_mult1 is now [simp] by default.
haftmann@32600
  1721
INCOMPATIBILITY.
haftmann@32600
  1722
haftmann@32588
  1723
* Refinements to lattice classes and sets:
haftmann@32064
  1724
  - less default intro/elim rules in locale variant, more default
haftmann@32064
  1725
    intro/elim rules in class variant: more uniformity
wenzelm@33842
  1726
  - lemma ge_sup_conv renamed to le_sup_iff, in accordance with
wenzelm@33842
  1727
    le_inf_iff
wenzelm@33842
  1728
  - dropped lemma alias inf_ACI for inf_aci (same for sup_ACI and
wenzelm@33842
  1729
    sup_aci)
haftmann@32064
  1730
  - renamed ACI to inf_sup_aci
haftmann@32600
  1731
  - new class "boolean_algebra"
wenzelm@33842
  1732
  - class "complete_lattice" moved to separate theory
haftmann@33860
  1733
    "Complete_Lattice"; corresponding constants (and abbreviations)
wenzelm@33842
  1734
    renamed and with authentic syntax:
haftmann@33860
  1735
    Set.Inf ~>    Complete_Lattice.Inf
haftmann@33860
  1736
    Set.Sup ~>    Complete_Lattice.Sup
haftmann@33860
  1737
    Set.INFI ~>   Complete_Lattice.INFI
haftmann@33860
  1738
    Set.SUPR ~>   Complete_Lattice.SUPR
haftmann@33860
  1739
    Set.Inter ~>  Complete_Lattice.Inter
haftmann@33860
  1740
    Set.Union ~>  Complete_Lattice.Union
haftmann@33860
  1741
    Set.INTER ~>  Complete_Lattice.INTER
haftmann@33860
  1742
    Set.UNION ~>  Complete_Lattice.UNION
haftmann@32600
  1743
  - authentic syntax for
haftmann@32600
  1744
    Set.Pow
haftmann@32600
  1745
    Set.image
haftmann@32588
  1746
  - mere abbreviations:
haftmann@32588
  1747
    Set.empty               (for bot)
haftmann@32588
  1748
    Set.UNIV                (for top)
haftmann@33860
  1749
    Set.inter               (for inf, formerly Set.Int)
haftmann@33860
  1750
    Set.union               (for sup, formerly Set.Un)
haftmann@32588
  1751
    Complete_Lattice.Inter  (for Inf)
haftmann@32588
  1752
    Complete_Lattice.Union  (for Sup)
haftmann@32606
  1753
    Complete_Lattice.INTER  (for INFI)
haftmann@32606
  1754
    Complete_Lattice.UNION  (for SUPR)
haftmann@32600
  1755
  - object-logic definitions as far as appropriate
haftmann@32217
  1756
haftmann@32691
  1757
INCOMPATIBILITY.  Care is required when theorems Int_subset_iff or
wenzelm@33842
  1758
Un_subset_iff are explicitly deleted as default simp rules; then also
wenzelm@33842
  1759
their lattice counterparts le_inf_iff and le_sup_iff have to be
haftmann@32691
  1760
deleted to achieve the desired effect.
haftmann@32064
  1761
wenzelm@33842
  1762
* Rules inf_absorb1, inf_absorb2, sup_absorb1, sup_absorb2 are no simp
wenzelm@33842
  1763
rules by default any longer; the same applies to min_max.inf_absorb1
wenzelm@33842
  1764
etc.  INCOMPATIBILITY.
wenzelm@33842
  1765
wenzelm@33842
  1766
* Rules sup_Int_eq and sup_Un_eq are no longer declared as
wenzelm@33842
  1767
pred_set_conv by default.  INCOMPATIBILITY.
wenzelm@33842
  1768
wenzelm@33842
  1769
* Power operations on relations and functions are now one dedicated
haftmann@32706
  1770
constant "compow" with infix syntax "^^".  Power operation on
wenzelm@31547
  1771
multiplicative monoids retains syntax "^" and is now defined generic
wenzelm@31547
  1772
in class power.  INCOMPATIBILITY.
wenzelm@31547
  1773
wenzelm@33842
  1774
* Relation composition "R O S" now has a more standard argument order:
wenzelm@33842
  1775
"R O S = {(x, z). EX y. (x, y) : R & (y, z) : S}".  INCOMPATIBILITY,
wenzelm@33842
  1776
rewrite propositions with "S O R" --> "R O S". Proofs may occasionally
wenzelm@33842
  1777
break, since the O_assoc rule was not rewritten like this.  Fix using
wenzelm@33842
  1778
O_assoc[symmetric].  The same applies to the curried version "R OO S".
wenzelm@32427
  1779
nipkow@33057
  1780
* Function "Inv" is renamed to "inv_into" and function "inv" is now an
wenzelm@33842
  1781
abbreviation for "inv_into UNIV".  Lemmas are renamed accordingly.
nipkow@32988
  1782
INCOMPATIBILITY.
nipkow@32988
  1783
haftmann@33860
  1784
* Most rules produced by inductive and datatype package have mandatory
haftmann@33860
  1785
prefixes.  INCOMPATIBILITY.
nipkow@31790
  1786
wenzelm@33842
  1787
* Changed "DERIV_intros" to a dynamic fact, which can be augmented by
wenzelm@33842
  1788
the attribute of the same name.  Each of the theorems in the list
wenzelm@33842
  1789
DERIV_intros assumes composition with an additional function and
wenzelm@33842
  1790
matches a variable to the derivative, which has to be solved by the
wenzelm@33842
  1791
Simplifier.  Hence (auto intro!: DERIV_intros) computes the derivative
wenzelm@33873
  1792
of most elementary terms.  Former Maclauren.DERIV_tac and
wenzelm@33873
  1793
Maclauren.deriv_tac should be replaced by (auto intro!: DERIV_intros).
wenzelm@33873
  1794
INCOMPATIBILITY.
haftmann@33860
  1795
haftmann@33860
  1796
* Code generator attributes follow the usual underscore convention:
haftmann@33860
  1797
    code_unfold     replaces    code unfold
haftmann@33860
  1798
    code_post       replaces    code post
haftmann@33860
  1799
    etc.
haftmann@33860
  1800
  INCOMPATIBILITY.
wenzelm@31900
  1801
krauss@33471
  1802
* Renamed methods:
krauss@33471
  1803
    sizechange -> size_change
krauss@33471
  1804
    induct_scheme -> induction_schema
haftmann@33860
  1805
  INCOMPATIBILITY.
nipkow@33673
  1806
wenzelm@33843
  1807
* Discontinued abbreviation "arbitrary" of constant "undefined".
wenzelm@33843
  1808
INCOMPATIBILITY, use "undefined" directly.
wenzelm@33843
  1809
haftmann@33860
  1810
* Renamed theorems:
haftmann@33860
  1811
    Suc_eq_add_numeral_1 -> Suc_eq_plus1
haftmann@33860
  1812
    Suc_eq_add_numeral_1_left -> Suc_eq_plus1_left
haftmann@33860
  1813
    Suc_plus1 -> Suc_eq_plus1
haftmann@33860
  1814
    *anti_sym -> *antisym*
haftmann@33860
  1815
    vector_less_eq_def -> vector_le_def
haftmann@33860
  1816
  INCOMPATIBILITY.
haftmann@33860
  1817
haftmann@33860
  1818
* Added theorem List.map_map as [simp].  Removed List.map_compose.
haftmann@33860
  1819
INCOMPATIBILITY.
haftmann@33860
  1820
haftmann@33860
  1821
* Removed predicate "M hassize n" (<--> card M = n & finite M).
haftmann@33860
  1822
INCOMPATIBILITY.
haftmann@33860
  1823
hoelzl@31812
  1824
huffman@33825
  1825
*** HOLCF ***
huffman@33825
  1826
wenzelm@33842
  1827
* Theory Representable defines a class "rep" of domains that are
wenzelm@33842
  1828
representable (via an ep-pair) in the universal domain type "udom".
huffman@33825
  1829
Instances are provided for all type constructors defined in HOLCF.
huffman@33825
  1830
huffman@33825
  1831
* The 'new_domain' command is a purely definitional version of the
huffman@33825
  1832
domain package, for representable domains.  Syntax is identical to the
huffman@33825
  1833
old domain package.  The 'new_domain' package also supports indirect
huffman@33825
  1834
recursion using previously-defined type constructors.  See
wenzelm@33842
  1835
src/HOLCF/ex/New_Domain.thy for examples.
wenzelm@33842
  1836
wenzelm@33842
  1837
* Method "fixrec_simp" unfolds one step of a fixrec-defined constant
huffman@33825
  1838
on the left-hand side of an equation, and then performs
huffman@33825
  1839
simplification.  Rewriting is done using rules declared with the
wenzelm@33842
  1840
"fixrec_simp" attribute.  The "fixrec_simp" method is intended as a
wenzelm@33842
  1841
replacement for "fixpat"; see src/HOLCF/ex/Fixrec_ex.thy for examples.
huffman@33825
  1842
huffman@33825
  1843
* The pattern-match compiler in 'fixrec' can now handle constructors
huffman@33825
  1844
with HOL function types.  Pattern-match combinators for the Pair
huffman@33825
  1845
constructor are pre-configured.
huffman@33825
  1846
huffman@33825
  1847
* The 'fixrec' package now produces better fixed-point induction rules
huffman@33825
  1848
for mutually-recursive definitions:  Induction rules have conclusions
huffman@33825
  1849
of the form "P foo bar" instead of "P <foo, bar>".
huffman@33825
  1850
huffman@33825
  1851
* The constant "sq_le" (with infix syntax "<<" or "\<sqsubseteq>") has
huffman@33825
  1852
been renamed to "below".  The name "below" now replaces "less" in many
wenzelm@33842
  1853
theorem names.  (Legacy theorem names using "less" are still supported
wenzelm@33842
  1854
as well.)
huffman@33825
  1855
huffman@33825
  1856
* The 'fixrec' package now supports "bottom patterns".  Bottom
huffman@33825
  1857
patterns can be used to generate strictness rules, or to make
huffman@33825
  1858
functions more strict (much like the bang-patterns supported by the
wenzelm@33873
  1859
Glasgow Haskell Compiler).  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@33873
  1860
examples.
huffman@33825
  1861
huffman@33825
  1862
wenzelm@31304
  1863
*** ML ***
wenzelm@31304
  1864
wenzelm@33843
  1865
* Support for Poly/ML 5.3.0, with improved reporting of compiler
wenzelm@33843
  1866
errors and run-time exceptions, including detailed source positions.
wenzelm@33843
  1867
wenzelm@33843
  1868
* Structure Name_Space (formerly NameSpace) now manages uniquely
wenzelm@33843
  1869
identified entries, with some additional information such as source
wenzelm@33843
  1870
position, logical grouping etc.
wenzelm@33843
  1871
wenzelm@33524
  1872
* Theory and context data is now introduced by the simplified and
wenzelm@33524
  1873
modernized functors Theory_Data, Proof_Data, Generic_Data.  Data needs
wenzelm@33524
  1874
to be pure, but the old TheoryDataFun for mutable data (with explicit
wenzelm@33524
  1875
copy operation) is still available for some time.
wenzelm@33524
  1876
wenzelm@32742
  1877
* Structure Synchronized (cf. src/Pure/Concurrent/synchronized.ML)
wenzelm@32742
  1878
provides a high-level programming interface to synchronized state
wenzelm@32742
  1879
variables with atomic update.  This works via pure function
wenzelm@32742
  1880
application within a critical section -- its runtime should be as
wenzelm@32742
  1881
short as possible; beware of deadlocks if critical code is nested,
wenzelm@32742
  1882
either directly or indirectly via other synchronized variables!
wenzelm@32742
  1883
wenzelm@32742
  1884
* Structure Unsynchronized (cf. src/Pure/ML-Systems/unsynchronized.ML)
wenzelm@32742
  1885
wraps raw ML references, explicitly indicating their non-thread-safe
wenzelm@32742
  1886
behaviour.  The Isar toplevel keeps this structure open, to
wenzelm@32742
  1887
accommodate Proof General as well as quick and dirty interactive
wenzelm@32742
  1888
experiments with references.
wenzelm@32742
  1889
wenzelm@32365
  1890
* PARALLEL_CHOICE and PARALLEL_GOALS provide basic support for
wenzelm@32365
  1891
parallel tactical reasoning.
wenzelm@32365
  1892
wenzelm@32427
  1893
* Tacticals Subgoal.FOCUS, Subgoal.FOCUS_PREMS, Subgoal.FOCUS_PARAMS
wenzelm@32427
  1894
are similar to SUBPROOF, but are slightly more flexible: only the
wenzelm@32427
  1895
specified parts of the subgoal are imported into the context, and the
wenzelm@32427
  1896
body tactic may introduce new subgoals and schematic variables.
wenzelm@32427
  1897
wenzelm@32427
  1898
* Old tactical METAHYPS, which does not observe the proof context, has
wenzelm@32427
  1899
been renamed to Old_Goals.METAHYPS and awaits deletion.  Use SUBPROOF
wenzelm@32427
  1900
or Subgoal.FOCUS etc.
wenzelm@32216
  1901
wenzelm@31971
  1902
* Renamed functor TableFun to Table, and GraphFun to Graph.  (Since
wenzelm@31971
  1903
functors have their own ML name space there is no point to mark them
wenzelm@31971
  1904
separately.)  Minor INCOMPATIBILITY.
wenzelm@31971
  1905
wenzelm@31901
  1906
* Renamed NamedThmsFun to Named_Thms.  INCOMPATIBILITY.
wenzelm@31901
  1907
wenzelm@33842
  1908
* Renamed several structures FooBar to Foo_Bar.  Occasional,
wenzelm@33842
  1909
INCOMPATIBILITY.
wenzelm@33842
  1910
wenzelm@33843
  1911
* Operations of structure Skip_Proof no longer require quick_and_dirty
wenzelm@33843
  1912
mode, which avoids critical setmp.
wenzelm@33843
  1913
wenzelm@31306
  1914
* Eliminated old Attrib.add_attributes, Method.add_methods and related
wenzelm@33842
  1915
combinators for "args".  INCOMPATIBILITY, need to use simplified
wenzelm@31306
  1916
Attrib/Method.setup introduced in Isabelle2009.
wenzelm@31304
  1917
wenzelm@32151
  1918
* Proper context for simpset_of, claset_of, clasimpset_of.  May fall
wenzelm@32151
  1919
back on global_simpset_of, global_claset_of, global_clasimpset_of as
wenzelm@32151
  1920
last resort.  INCOMPATIBILITY.
wenzelm@32151
  1921
wenzelm@32092
  1922
* Display.pretty_thm now requires a proper context (cf. former
wenzelm@32092
  1923
ProofContext.pretty_thm).  May fall back on Display.pretty_thm_global
wenzelm@32092
  1924
or even Display.pretty_thm_without_context as last resort.
wenzelm@32092
  1925
INCOMPATIBILITY.
wenzelm@32092
  1926
wenzelm@32433
  1927
* Discontinued Display.pretty_ctyp/cterm etc.  INCOMPATIBILITY, use
wenzelm@32433
  1928
Syntax.pretty_typ/term directly, preferably with proper context
wenzelm@32433
  1929
instead of global theory.
wenzelm@32433
  1930
wenzelm@31304
  1931
wenzelm@31308
  1932
*** System ***
wenzelm@31308
  1933
wenzelm@33842
  1934
* Further fine tuning of parallel proof checking, scales up to 8 cores
wenzelm@33842
  1935
(max. speedup factor 5.0).  See also Goal.parallel_proofs in ML and
wenzelm@33842
  1936
usedir option -q.
wenzelm@33842
  1937
wenzelm@32326
  1938
* Support for additional "Isabelle components" via etc/components, see
wenzelm@32326
  1939
also the system manual.
wenzelm@32326
  1940
wenzelm@32326
  1941
* The isabelle makeall tool now operates on all components with
wenzelm@32326
  1942
IsaMakefile, not just hardwired "logics".
wenzelm@32326
  1943
wenzelm@33842
  1944
* Removed "compress" option from isabelle-process and isabelle usedir;
wenzelm@33842
  1945
this is always enabled.
kleing@33818
  1946
wenzelm@31308
  1947
* Discontinued support for Poly/ML 4.x versions.
wenzelm@31308
  1948
wenzelm@33842
  1949
* Isabelle tool "wwwfind" provides web interface for 'find_theorems'
wenzelm@33842
  1950
on a given logic image.  This requires the lighttpd webserver and is
wenzelm@33842
  1951
currently supported on Linux only.
wenzelm@32061
  1952
wenzelm@31308
  1953
wenzelm@31304
  1954
wenzelm@30845
  1955
New in Isabelle2009 (April 2009)
wenzelm@30845
  1956
--------------------------------
haftmann@27104
  1957
wenzelm@27599
  1958
*** General ***
wenzelm@27599
  1959
wenzelm@28504
  1960
* Simplified main Isabelle executables, with less surprises on
wenzelm@28504
  1961
case-insensitive file-systems (such as Mac OS).
wenzelm@28504
  1962
wenzelm@28504
  1963
  - The main Isabelle tool wrapper is now called "isabelle" instead of
wenzelm@28504
  1964
    "isatool."
wenzelm@28504
  1965
wenzelm@28504
  1966
  - The former "isabelle" alias for "isabelle-process" has been
wenzelm@28504
  1967
    removed (should rarely occur to regular users).
wenzelm@28504
  1968
wenzelm@28915
  1969
  - The former "isabelle-interface" and its alias "Isabelle" have been
wenzelm@28915
  1970
    removed (interfaces are now regular Isabelle tools).
wenzelm@28504
  1971
wenzelm@28504
  1972
Within scripts and make files, the Isabelle environment variables
wenzelm@28504
  1973
ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE,
wenzelm@28504
  1974
respectively.  (The latter are still available as legacy feature.)
wenzelm@28504
  1975
wenzelm@28915
  1976
The old isabelle-interface wrapper could react in confusing ways if
wenzelm@28915
  1977
the interface was uninstalled or changed otherwise.  Individual
wenzelm@28915
  1978
interface tool configuration is now more explicit, see also the
wenzelm@28915
  1979
Isabelle system manual.  In particular, Proof General is now available
wenzelm@28915
  1980
via "isabelle emacs".
wenzelm@28504
  1981
wenzelm@28504
  1982
INCOMPATIBILITY, need to adapt derivative scripts.  Users may need to
wenzelm@28504
  1983
purge installed copies of Isabelle executables and re-run "isabelle
wenzelm@28504
  1984
install -p ...", or use symlinks.
wenzelm@28504
  1985
wenzelm@28914
  1986
* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the
wenzelm@30845
  1987
old ~/isabelle, which was slightly non-standard and apt to cause
wenzelm@30845
  1988
surprises on case-insensitive file-systems (such as Mac OS).
wenzelm@28914
  1989
wenzelm@28914
  1990
INCOMPATIBILITY, need to move existing ~/isabelle/etc,
wenzelm@28914
  1991
~/isabelle/heaps, ~/isabelle/browser_info to the new place.  Special
wenzelm@28914
  1992
care is required when using older releases of Isabelle.  Note that
wenzelm@28914
  1993
ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any
wenzelm@30845
  1994
Isabelle distribution, in order to use the new ~/.isabelle uniformly.
wenzelm@28914
  1995
wenzelm@29161
  1996
* Proofs of fully specified statements are run in parallel on
wenzelm@30845
  1997
multi-core systems.  A speedup factor of 2.5 to 3.2 can be expected on
wenzelm@30845
  1998
a regular 4-core machine, if the initial heap space is made reasonably
wenzelm@30845
  1999
large (cf. Poly/ML option -H).  (Requires Poly/ML 5.2.1 or later.)
wenzelm@30845
  2000
wenzelm@30845
  2001
* The main reference manuals ("isar-ref", "implementation", and
wenzelm@30845
  2002
"system") have been updated and extended.  Formally checked references
wenzelm@30845
  2003
as hyperlinks are now available uniformly.
wenzelm@30845
  2004
wenzelm@30163
  2005
wenzelm@27599
  2006
*** Pure ***
wenzelm@27599
  2007
wenzelm@30845
  2008
* Complete re-implementation of locales.  INCOMPATIBILITY in several
wenzelm@30845
  2009
respects.  The most important changes are listed below.  See the
wenzelm@30845
  2010
Tutorial on Locales ("locales" manual) for details.
ballarin@29253
  2011
ballarin@29253
  2012
- In locale expressions, instantiation replaces renaming.  Parameters
ballarin@29253
  2013
must be declared in a for clause.  To aid compatibility with previous
ballarin@29253
  2014
parameter inheritance, in locale declarations, parameters that are not
ballarin@29253
  2015
'touched' (instantiation position "_" or omitted) are implicitly added
ballarin@29253
  2016
with their syntax at the beginning of the for clause.
ballarin@29253
  2017
ballarin@29253
  2018
- Syntax from abbreviations and definitions in locales is available in
ballarin@29253
  2019
locale expressions and context elements.  The latter is particularly
ballarin@29253
  2020
useful in locale declarations.
ballarin@29253
  2021
ballarin@29253
  2022
- More flexible mechanisms to qualify names generated by locale
ballarin@29253
  2023
expressions.  Qualifiers (prefixes) may be specified in locale
wenzelm@30728
  2024
expressions, and can be marked as mandatory (syntax: "name!:") or
wenzelm@30728
  2025
optional (syntax "name?:").  The default depends for plain "name:"
wenzelm@30728
  2026
depends on the situation where a locale expression is used: in
wenzelm@30728
  2027
commands 'locale' and 'sublocale' prefixes are optional, in
wenzelm@30845
  2028
'interpretation' and 'interpret' prefixes are mandatory.  The old
wenzelm@30728
  2029
implicit qualifiers derived from the parameter names of a locale are
wenzelm@30728
  2030
no longer generated.
wenzelm@30106
  2031
wenzelm@30845
  2032
- Command "sublocale l < e" replaces "interpretation l < e".  The
wenzelm@30106
  2033
instantiation clause in "interpretation" and "interpret" (square
wenzelm@30106
  2034
brackets) is no longer available.  Use locale expressions.
ballarin@29253
  2035
wenzelm@30845
  2036
- When converting proof scripts, mandatory qualifiers in
wenzelm@30728
  2037
'interpretation' and 'interpret' should be retained by default, even
wenzelm@30845
  2038
if this is an INCOMPATIBILITY compared to former behavior.  In the
wenzelm@30845
  2039
worst case, use the "name?:" form for non-mandatory ones.  Qualifiers
wenzelm@30845
  2040
in locale expressions range over a single locale instance only.
wenzelm@30845
  2041
wenzelm@30845
  2042
- Dropped locale element "includes".  This is a major INCOMPATIBILITY.
wenzelm@30845
  2043
In existing theorem specifications replace the includes element by the
wenzelm@30845
  2044
respective context elements of the included locale, omitting those
wenzelm@30845
  2045
that are already present in the theorem specification.  Multiple
wenzelm@30845
  2046
assume elements of a locale should be replaced by a single one
wenzelm@30845
  2047
involving the locale predicate.  In the proof body, declarations (most
wenzelm@30845
  2048
notably theorems) may be regained by interpreting the respective
wenzelm@30845
  2049
locales in the proof context as required (command "interpret").
wenzelm@30845
  2050
wenzelm@30845
  2051
If using "includes" in replacement of a target solely because the
wenzelm@30845
  2052
parameter types in the theorem are not as general as in the target,
wenzelm@30845
  2053
consider declaring a new locale with additional type constraints on
wenzelm@30845
  2054
the parameters (context element "constrains").
wenzelm@30845
  2055
wenzelm@30845
  2056
- Discontinued "locale (open)".  INCOMPATIBILITY.
wenzelm@30845
  2057
wenzelm@30845
  2058
- Locale interpretation commands no longer attempt to simplify goal.
wenzelm@30845
  2059
INCOMPATIBILITY: in rare situations the generated goal differs.  Use
wenzelm@30845
  2060
methods intro_locales and unfold_locales to clarify.
wenzelm@30845
  2061
wenzelm@30845
  2062
- Locale interpretation commands no longer accept interpretation
wenzelm@30845
  2063
attributes.  INCOMPATIBILITY.
wenzelm@30845
  2064
wenzelm@30845
  2065
* Class declaration: so-called "base sort" must not be given in import
wenzelm@30845
  2066
list any longer, but is inferred from the specification.  Particularly
wenzelm@30845
  2067
in HOL, write
wenzelm@30845
  2068
wenzelm@30845
  2069
    class foo = ...
wenzelm@30845
  2070
wenzelm@30845
  2071
instead of
wenzelm@30845
  2072
wenzelm@30845
  2073
    class foo = type + ...
wenzelm@30845
  2074
wenzelm@30845
  2075
* Class target: global versions of theorems stemming do not carry a
wenzelm@30845
  2076
parameter prefix any longer.  INCOMPATIBILITY.
wenzelm@30845
  2077
wenzelm@30845
  2078
* Class 'instance' command no longer accepts attached definitions.
wenzelm@30845
  2079
INCOMPATIBILITY, use proper 'instantiation' target instead.
wenzelm@30845
  2080
wenzelm@30845
  2081
* Recovered hiding of consts, which was accidentally broken in
wenzelm@30845
  2082
Isabelle2007.  Potential INCOMPATIBILITY, ``hide const c'' really
wenzelm@30845
  2083
makes c inaccessible; consider using ``hide (open) const c'' instead.
wenzelm@30845
  2084
wenzelm@30845
  2085
* Slightly more coherent Pure syntax, with updated documentation in
wenzelm@30845
  2086
isar-ref manual.  Removed locales meta_term_syntax and
wenzelm@30845
  2087
meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent,
wenzelm@30845
  2088
INCOMPATIBILITY in rare situations.  Note that &&& should not be used
wenzelm@30845
  2089
directly in regular applications.
wenzelm@30845
  2090
wenzelm@30845
  2091
* There is a new syntactic category "float_const" for signed decimal
wenzelm@30845
  2092
fractions (e.g. 123.45 or -123.45).
wenzelm@30845
  2093
wenzelm@30845
  2094
* Removed exotic 'token_translation' command.  INCOMPATIBILITY, use ML
wenzelm@30845
  2095
interface with 'setup' command instead.
wenzelm@30845
  2096
wenzelm@30845
  2097
* Command 'local_setup' is similar to 'setup', but operates on a local
wenzelm@30845
  2098
theory context.
haftmann@27104
  2099
wenzelm@28114
  2100
* The 'axiomatization' command now only works within a global theory
wenzelm@28114
  2101
context.  INCOMPATIBILITY.
wenzelm@28114
  2102
wenzelm@30845
  2103
* Goal-directed proof now enforces strict proof irrelevance wrt. sort
wenzelm@30845
  2104
hypotheses.  Sorts required in the course of reasoning need to be
wenzelm@30845
  2105
covered by the constraints in the initial statement, completed by the
wenzelm@30845
  2106
type instance information of the background theory.  Non-trivial sort
wenzelm@30845
  2107
hypotheses, which rarely occur in practice, may be specified via
wenzelm@30845
  2108
vacuous propositions of the form SORT_CONSTRAINT('a::c).  For example:
wenzelm@30845
  2109
wenzelm@30845
  2110
  lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ...
wenzelm@30845
  2111
wenzelm@30845
  2112
The result contains an implicit sort hypotheses as before --
wenzelm@30845
  2113
SORT_CONSTRAINT premises are eliminated as part of the canonical rule
wenzelm@30845
  2114
normalization.
wenzelm@30845
  2115
wenzelm@30845
  2116
* Generalized Isar history, with support for linear undo, direct state
wenzelm@30845
  2117
addressing etc.
wenzelm@30845
  2118
wenzelm@30845
  2119
* Changed defaults for unify configuration options:
wenzelm@30845
  2120
wenzelm@30845
  2121
  unify_trace_bound = 50 (formerly 25)
wenzelm@30845
  2122
  unify_search_bound = 60 (formerly 30)
wenzelm@30845
  2123
wenzelm@30845
  2124
* Different bookkeeping for code equations (INCOMPATIBILITY):
wenzelm@30845
  2125
wenzelm@30845
  2126
  a) On theory merge, the last set of code equations for a particular
wenzelm@30845
  2127
     constant is taken (in accordance with the policy applied by other
wenzelm@30845
  2128
     parts of the code generator framework).
wenzelm@30845
  2129
wenzelm@30845
  2130
  b) Code equations stemming from explicit declarations (e.g. code
wenzelm@30845
  2131
     attribute) gain priority over default code equations stemming
wenzelm@30845
  2132
     from definition, primrec, fun etc.
wenzelm@30845
  2133
wenzelm@30845
  2134
* Keyword 'code_exception' now named 'code_abort'.  INCOMPATIBILITY.
wenzelm@30845
  2135
haftmann@30965
  2136
* Unified theorem tables for both code generators.  Thus [code
wenzelm@30845
  2137
func] has disappeared and only [code] remains.  INCOMPATIBILITY.
wenzelm@30577
  2138
wenzelm@30577
  2139
* Command 'find_consts' searches for constants based on type and name
wenzelm@30577
  2140
patterns, e.g.
kleing@29883
  2141
kleing@29883
  2142
    find_consts "_ => bool"
kleing@29883
  2143
wenzelm@30106
  2144
By default, matching is against subtypes, but it may be restricted to
wenzelm@30728
  2145
the whole type.  Searching by name is possible.  Multiple queries are
wenzelm@30106
  2146
conjunctive and queries may be negated by prefixing them with a
wenzelm@30106
  2147
hyphen:
kleing@29883
  2148
kleing@29883
  2149
    find_consts strict: "_ => bool" name: "Int" -"int => int"
kleing@29861
  2150
wenzelm@30845
  2151
* New 'find_theorems' criterion "solves" matches theorems that
wenzelm@30845
  2152
directly solve the current goal (modulo higher-order unification).
wenzelm@30845
  2153
wenzelm@30845
  2154
* Auto solve feature for main theorem statements: whenever a new goal
wenzelm@30845
  2155
is stated, "find_theorems solves" is called; any theorems that could
wenzelm@30845
  2156
solve the lemma directly are listed as part of the goal state.
wenzelm@30845
  2157
Cf. associated options in Proof General Isabelle settings menu,
wenzelm@30845
  2158
enabled by default, with reasonable timeout for pathological cases of
wenzelm@30845
  2159
higher-order unification.
webertj@30415
  2160
haftmann@27104
  2161
wenzelm@27381
  2162
*** Document preparation ***
wenzelm@27381
  2163
wenzelm@27381
  2164
* Antiquotation @{lemma} now imitates a regular terminal proof,
wenzelm@27392
  2165
demanding keyword 'by' and supporting the full method expression
wenzelm@27519
  2166
syntax just like the Isar command 'by'.
wenzelm@27381
  2167
wenzelm@27381
  2168
haftmann@27104
  2169
*** HOL ***
haftmann@27104
  2170
wenzelm@30845
  2171
* Integrated main parts of former image HOL-Complex with HOL.  Entry
wenzelm@30845
  2172
points Main and Complex_Main remain as before.
wenzelm@30845
  2173
wenzelm@30845
  2174
* Logic image HOL-Plain provides a minimal HOL with the most important
wenzelm@30845
  2175
tools available (inductive, datatype, primrec, ...).  This facilitates
wenzelm@30845
  2176
experimentation and tool development.  Note that user applications
wenzelm@30845
  2177
(and library theories) should never refer to anything below theory
wenzelm@30845
  2178
Main, as before.
wenzelm@30845
  2179
wenzelm@30845
  2180
* Logic image HOL-Main stops at theory Main, and thus facilitates
wenzelm@30845
  2181
experimentation due to shorter build times.
wenzelm@30845
  2182
wenzelm@30845
  2183
* Logic image HOL-NSA contains theories of nonstandard analysis which
wenzelm@30845
  2184
were previously part of former HOL-Complex.  Entry point Hyperreal
wenzelm@30845
  2185
remains valid, but theories formerly using Complex_Main should now use
wenzelm@30845
  2186
new entry point Hypercomplex.
wenzelm@30845
  2187
wenzelm@30845
  2188
* Generic ATP manager for Sledgehammer, based on ML threads instead of
wenzelm@30845
  2189
Posix processes.  Avoids potentially expensive forking of the ML
wenzelm@30845
  2190
process.  New thread-based implementation also works on non-Unix
wenzelm@30845
  2191
platforms (Cygwin).  Provers are no longer hardwired, but defined
wenzelm@30845
  2192
within the theory via plain ML wrapper functions.  Basic Sledgehammer
wenzelm@30845
  2193
commands are covered in the isar-ref manual.
wenzelm@30845
  2194
wenzelm@30845
  2195
* Wrapper scripts for remote SystemOnTPTP service allows to use
wenzelm@30845
  2196
sledgehammer without local ATP installation (Vampire etc.). Other
wenzelm@30845
  2197
provers may be included via suitable ML wrappers, see also
wenzelm@30845
  2198
src/HOL/ATP_Linkup.thy.
wenzelm@30845
  2199
wenzelm@30845
  2200
* ATP selection (E/Vampire/Spass) is now via Proof General's settings
wenzelm@30845
  2201
menu.
wenzelm@30845
  2202
wenzelm@30845
  2203
* The metis method no longer fails because the theorem is too trivial
wenzelm@30845
  2204
(contains the empty clause).
wenzelm@30845
  2205
wenzelm@30845
  2206
* The metis method now fails in the usual manner, rather than raising
wenzelm@30845
  2207
an exception, if it determines that it cannot prove the theorem.
wenzelm@30845
  2208
wenzelm@30845
  2209
* Method "coherent" implements a prover for coherent logic (see also
wenzelm@30845
  2210
src/Tools/coherent.ML).
wenzelm@30845
  2211
wenzelm@30845
  2212
* Constants "undefined" and "default" replace "arbitrary".  Usually
wenzelm@30845
  2213
"undefined" is the right choice to replace "arbitrary", though
wenzelm@30845
  2214
logically there is no difference.  INCOMPATIBILITY.
wenzelm@30845
  2215
wenzelm@30845
  2216
* Command "value" now integrates different evaluation mechanisms.  The
wenzelm@30845
  2217
result of the first successful evaluation mechanism is printed.  In
wenzelm@30845
  2218
square brackets a particular named evaluation mechanisms may be
wenzelm@30845
  2219
specified (currently, [SML], [code] or [nbe]).  See further
wenzelm@30845
  2220
src/HOL/ex/Eval_Examples.thy.
wenzelm@30845
  2221
wenzelm@30845
  2222
* Normalization by evaluation now allows non-leftlinear equations.
wenzelm@30845
  2223
Declare with attribute [code nbe].
wenzelm@30845
  2224
wenzelm@30845
  2225
* Methods "case_tac" and "induct_tac" now refer to the very same rules
wenzelm@30845
  2226
as the structured Isar versions "cases" and "induct", cf. the
wenzelm@30845
  2227
corresponding "cases" and "induct" attributes.  Mutual induction rules
wenzelm@30845
  2228
are now presented as a list of individual projections
wenzelm@30845
  2229
(e.g. foo_bar.inducts for types foo and bar); the old format with
wenzelm@30845
  2230
explicit HOL conjunction is no longer supported.  INCOMPATIBILITY, in
wenzelm@30845
  2231
rare situations a different rule is selected --- notably nested tuple
wenzelm@30845
  2232
elimination instead of former prod.exhaust: use explicit (case_tac t
wenzelm@30845
  2233
rule: prod.exhaust) here.
wenzelm@30845
  2234
wenzelm@30845
  2235
* Attributes "cases", "induct", "coinduct" support "del" option.
wenzelm@30845
  2236
wenzelm@30845
  2237
* Removed fact "case_split_thm", which duplicates "case_split".
wenzelm@30845
  2238
wenzelm@30845
  2239
* The option datatype has been moved to a new theory Option.  Renamed
wenzelm@30845
  2240
option_map to Option.map, and o2s to Option.set, INCOMPATIBILITY.
wenzelm@30845
  2241
wenzelm@30845
  2242
* New predicate "strict_mono" classifies strict functions on partial
wenzelm@30845
  2243
orders.  With strict functions on linear orders, reasoning about
wenzelm@30845
  2244
(in)equalities is facilitated by theorems "strict_mono_eq",
wenzelm@30845
  2245
"strict_mono_less_eq" and "strict_mono_less".
wenzelm@30845
  2246
wenzelm@30845
  2247
* Some set operations are now proper qualified constants with
wenzelm@30845
  2248
authentic syntax.  INCOMPATIBILITY:
haftmann@30304
  2249
haftmann@30304
  2250
    op Int ~>   Set.Int
haftmann@30304
  2251
    op Un ~>    Set.Un
haftmann@30304
  2252
    INTER ~>    Set.INTER
haftmann@30304
  2253
    UNION ~>    Set.UNION
haftmann@30304
  2254
    Inter ~>    Set.Inter
haftmann@30304
  2255
    Union ~>    Set.Union
haftmann@30304
  2256
    {} ~>       Set.empty
haftmann@30304
  2257
    UNIV ~>     Set.UNIV
haftmann@30304
  2258
wenzelm@30845
  2259
* Class complete_lattice with operations Inf, Sup, INFI, SUPR now in
wenzelm@30845
  2260
theory Set.
wenzelm@30845
  2261
wenzelm@30845
  2262
* Auxiliary class "itself" has disappeared -- classes without any
wenzelm@30845
  2263
parameter are treated as expected by the 'class' command.
haftmann@29797
  2264
haftmann@29823
  2265
* Leibnitz's Series for Pi and the arcus tangens and logarithm series.
haftmann@29823
  2266
wenzelm@30845
  2267
* Common decision procedures (Cooper, MIR, Ferrack, Approximation,
wenzelm@30845
  2268
Dense_Linear_Order) are now in directory HOL/Decision_Procs.
wenzelm@30845
  2269
wenzelm@30845
  2270
* Theory src/HOL/Decision_Procs/Approximation provides the new proof
wenzelm@30845
  2271
method "approximation".  It proves formulas on real values by using
wenzelm@30845
  2272
interval arithmetic.  In the formulas are also the transcendental
wenzelm@30845
  2273
functions sin, cos, tan, atan, ln, exp and the constant pi are
wenzelm@30845
  2274
allowed. For examples see
wenzelm@30845
  2275
src/HOL/Descision_Procs/ex/Approximation_Ex.thy.
haftmann@29823
  2276
haftmann@29823
  2277
* Theory "Reflection" now resides in HOL/Library.
haftmann@29650
  2278
wenzelm@30845
  2279
* Entry point to Word library now simply named "Word".
wenzelm@30845
  2280
INCOMPATIBILITY.
haftmann@29628
  2281
haftmann@29197
  2282
* Made source layout more coherent with logical distribution
haftmann@29197
  2283
structure:
haftmann@28952
  2284
haftmann@28952
  2285
    src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy
haftmann@28952
  2286
    src/HOL/Library/Code_Message.thy ~> src/HOL/
haftmann@28952
  2287
    src/HOL/Library/GCD.thy ~> src/HOL/
haftmann@28952
  2288
    src/HOL/Library/Order_Relation.thy ~> src/HOL/
haftmann@28952
  2289
    src/HOL/Library/Parity.thy ~> src/HOL/
haftmann@28952
  2290
    src/HOL/Library/Univ_Poly.thy ~> src/HOL/
huffman@30176
  2291
    src/HOL/Real/ContNotDenum.thy ~> src/HOL/Library/
haftmann@28952
  2292
    src/HOL/Real/Lubs.thy ~> src/HOL/
haftmann@28952
  2293
    src/HOL/Real/PReal.thy ~> src/HOL/
haftmann@28952
  2294
    src/HOL/Real/Rational.thy ~> src/HOL/
haftmann@28952
  2295
    src/HOL/Real/RComplete.thy ~> src/HOL/
haftmann@28952
  2296
    src/HOL/Real/RealDef.thy ~> src/HOL/
haftmann@28952
  2297
    src/HOL/Real/RealPow.thy ~> src/HOL/
haftmann@28952
  2298
    src/HOL/Real/Real.thy ~> src/HOL/
haftmann@28952
  2299
    src/HOL/Complex/Complex_Main.thy ~> src/HOL/
haftmann@28952
  2300
    src/HOL/Complex/Complex.thy ~> src/HOL/
huffman@30176
  2301
    src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/Library/
huffman@30176
  2302
    src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/Library/
haftmann@28952
  2303
    src/HOL/Hyperreal/Deriv.thy ~> src/HOL/
haftmann@28952
  2304
    src/HOL/Hyperreal/Fact.thy ~> src/HOL/
haftmann@28952
  2305
    src/HOL/Hyperreal/Integration.thy ~> src/HOL/
haftmann@28952
  2306
    src/HOL/Hyperreal/Lim.thy ~> src/HOL/
haftmann@28952
  2307
    src/HOL/Hyperreal/Ln.thy ~> src/HOL/
haftmann@28952
  2308
    src/HOL/Hyperreal/Log.thy ~> src/HOL/
haftmann@28952
  2309
    src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/
haftmann@28952
  2310
    src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/
haftmann@28952
  2311
    src/HOL/Hyperreal/Series.thy ~> src/HOL/
haftmann@29197
  2312
    src/HOL/Hyperreal/SEQ.thy ~> src/HOL/
haftmann@28952
  2313
    src/HOL/Hyperreal/Taylor.thy ~> src/HOL/
haftmann@28952
  2314
    src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/
haftmann@28952
  2315
    src/HOL/Real/Float ~> src/HOL/Library/
haftmann@29197
  2316
    src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach
haftmann@29197
  2317
    src/HOL/Real/RealVector.thy ~> src/HOL/
haftmann@28952
  2318
haftmann@28952
  2319
    src/HOL/arith_data.ML ~> src/HOL/Tools
haftmann@28952
  2320
    src/HOL/hologic.ML ~> src/HOL/Tools
haftmann@28952
  2321
    src/HOL/simpdata.ML ~> src/HOL/Tools
haftmann@28952
  2322
    src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML
haftmann@28952
  2323
    src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2324
    src/HOL/nat_simprocs.ML ~> src/HOL/Tools
haftmann@28952
  2325
    src/HOL/Real/float_arith.ML ~> src/HOL/Tools
haftmann@28952
  2326
    src/HOL/Real/float_syntax.ML ~> src/HOL/Tools
haftmann@28952
  2327
    src/HOL/Real/rat_arith.ML ~> src/HOL/Tools
haftmann@28952
  2328
    src/HOL/Real/real_arith.ML ~> src/HOL/Tools
haftmann@28952
  2329
haftmann@29398
  2330
    src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2331
    src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2332
    src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2333
    src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2334
    src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2335
    src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL
haftmann@29398
  2336
wenzelm@30845
  2337
* If methods "eval" and "evaluation" encounter a structured proof
wenzelm@30845
  2338
state with !!/==>, only the conclusion is evaluated to True (if
wenzelm@30845
  2339
possible), avoiding strange error messages.
wenzelm@30845
  2340
wenzelm@30845
  2341
* Method "sizechange" automates termination proofs using (a
wenzelm@30845
  2342
modification of) the size-change principle.  Requires SAT solver.  See
wenzelm@30845
  2343
src/HOL/ex/Termination.thy for examples.
wenzelm@30845
  2344
wenzelm@30845
  2345
* Simplifier: simproc for let expressions now unfolds if bound
wenzelm@30845
  2346
variable occurs at most once in let expression body.  INCOMPATIBILITY.
wenzelm@30845
  2347
wenzelm@30845
  2348
* Method "arith": Linear arithmetic now ignores all inequalities when
wenzelm@30845
  2349
fast_arith_neq_limit is exceeded, instead of giving up entirely.
wenzelm@30845
  2350
wenzelm@30845
  2351
* New attribute "arith" for facts that should always be used
wenzelm@30845
  2352
automatically by arithmetic. It is intended to be used locally in
wenzelm@30845
  2353
proofs, e.g.
wenzelm@30845
  2354
wenzelm@30845
  2355
  assumes [arith]: "x > 0"
wenzelm@30845
  2356
nipkow@30706
  2357
Global usage is discouraged because of possible performance impact.
nipkow@30706
  2358
wenzelm@30845
  2359
* New classes "top" and "bot" with corresponding operations "top" and
wenzelm@30845
  2360
"bot" in theory Orderings; instantiation of class "complete_lattice"
wenzelm@30845
  2361
requires instantiation of classes "top" and "bot".  INCOMPATIBILITY.
wenzelm@30845
  2362
wenzelm@30845
  2363
* Changed definition lemma "less_fun_def" in order to provide an
wenzelm@30845
  2364
instance for preorders on functions; use lemma "less_le" instead.
wenzelm@30845
  2365
INCOMPATIBILITY.
wenzelm@30845
  2366
wenzelm@30845
  2367
* Theory Orderings: class "wellorder" moved here, with explicit
wenzelm@30845
  2368
induction rule "less_induct" as assumption.  For instantiation of
wenzelm@30845
  2369
"wellorder" by means of predicate "wf", use rule wf_wellorderI.
wenzelm@30845
  2370
INCOMPATIBILITY.
wenzelm@30845
  2371
wenzelm@30845
  2372
* Theory Orderings: added class "preorder" as superclass of "order".
wenzelm@27793
  2373
INCOMPATIBILITY: Instantiation proofs for order, linorder
wenzelm@27793
  2374
etc. slightly changed.  Some theorems named order_class.* now named
wenzelm@27793
  2375
preorder_class.*.
wenzelm@27793
  2376
wenzelm@30845
  2377
* Theory Relation: renamed "refl" to "refl_on", "reflexive" to "refl,
wenzelm@30845
  2378
"diag" to "Id_on".
wenzelm@30845
  2379
wenzelm@30845
  2380
* Theory Finite_Set: added a new fold combinator of type
wenzelm@30845
  2381
nipkow@28855
  2382
  ('a => 'b => 'b) => 'b => 'a set => 'b
wenzelm@30845
  2383
wenzelm@30845
  2384
Occasionally this is more convenient than the old fold combinator
wenzelm@30845
  2385
which is now defined in terms of the new one and renamed to
wenzelm@30845
  2386
fold_image.
wenzelm@30845
  2387
wenzelm@30845
  2388
* Theories Ring_and_Field and OrderedGroup: The lemmas "group_simps"
wenzelm@30845
  2389
and "ring_simps" have been replaced by "algebra_simps" (which can be
wenzelm@30845
  2390
extended with further lemmas!).  At the moment both still exist but
wenzelm@30845
  2391
the former will disappear at some point.
wenzelm@30845
  2392
wenzelm@30845
  2393
* Theory Power: Lemma power_Suc is now declared as a simp rule in
wenzelm@30845
  2394
class recpower.  Type-specific simp rules for various recpower types
wenzelm@30845
  2395
have been removed.  INCOMPATIBILITY, rename old lemmas as follows:
huffman@30273
  2396
huffman@30273
  2397
rat_power_0    -> power_0
huffman@30273
  2398
rat_power_Suc  -> power_Suc
huffman@30273
  2399
realpow_0      -> power_0
huffman@30273
  2400
realpow_Suc    -> power_Suc
huffman@30273
  2401
complexpow_0   -> power_0
huffman@30273
  2402
complexpow_Suc -> power_Suc
huffman@30273
  2403
power_poly_0   -> power_0
huffman@30273
  2404
power_poly_Suc -> power_Suc
huffman@30273
  2405
wenzelm@30845
  2406
* Theories Ring_and_Field and Divides: Definition of "op dvd" has been
wenzelm@27793
  2407
moved to separate class dvd in Ring_and_Field; a couple of lemmas on
wenzelm@27793
  2408
dvd has been generalized to class comm_semiring_1.  Likewise a bunch
wenzelm@27793
  2409
of lemmas from Divides has been generalized from nat to class
wenzelm@27793
  2410
semiring_div.  INCOMPATIBILITY.  This involves the following theorem
wenzelm@27793
  2411
renames resulting from duplicate elimination:
haftmann@27651
  2412
haftmann@27651
  2413
    dvd_def_mod ~>          dvd_eq_mod_eq_0
haftmann@27651
  2414
    zero_dvd_iff ~>         dvd_0_left_iff
haftmann@28559
  2415
    dvd_0 ~>                dvd_0_right
haftmann@27651
  2416
    DIVISION_BY_ZERO_DIV ~> div_by_0
haftmann@27651
  2417
    DIVISION_BY_ZERO_MOD ~> mod_by_0
haftmann@27651
  2418
    mult_div ~>             div_mult_self2_is_id
haftmann@27651
  2419
    mult_mod ~>             mod_mult_self2_is_0
haftmann@27651
  2420
wenzelm@30845
  2421
* Theory IntDiv: removed many lemmas that are instances of class-based
wenzelm@30845
  2422
generalizations (from Divides and Ring_and_Field).  INCOMPATIBILITY,
wenzelm@30845
  2423
rename old lemmas as follows:
nipkow@30044
  2424
nipkow@30044
  2425
dvd_diff               -> nat_dvd_diff
nipkow@30044
  2426
dvd_zminus_iff         -> dvd_minus_iff
nipkow@30224
  2427
mod_add1_eq            -> mod_add_eq
nipkow@30224
  2428
mod_mult1_eq           -> mod_mult_right_eq
nipkow@30224
  2429
mod_mult1_eq'          -> mod_mult_left_eq
nipkow@30224
  2430
mod_mult_distrib_mod   -> mod_mult_eq
nipkow@30044
  2431
nat_mod_add_left_eq    -> mod_add_left_eq
nipkow@30044
  2432
nat_mod_add_right_eq   -> mod_add_right_eq
nipkow@30044
  2433
nat_mod_div_trivial    -> mod_div_trivial
nipkow@30044
  2434
nat_mod_mod_trivial    -> mod_mod_trivial
nipkow@30044
  2435
zdiv_zadd_self1        -> div_add_self1
nipkow@30044
  2436
zdiv_zadd_self2        -> div_add_self2
nipkow@30181
  2437
zdiv_zmult_self1       -> div_mult_self2_is_id
nipkow@30044
  2438
zdiv_zmult_self2       -> div_mult_self1_is_id
nipkow@30044
  2439
zdvd_triv_left         -> dvd_triv_left
nipkow@30044
  2440
zdvd_triv_right        -> dvd_triv_right
nipkow@30044
  2441
zdvd_zmult_cancel_disj -> dvd_mult_cancel_left
nipkow@30085
  2442
zmod_eq0_zdvd_iff      -> dvd_eq_mod_eq_0[symmetric]
nipkow@30044
  2443
zmod_zadd_left_eq      -> mod_add_left_eq
nipkow@30044
  2444
zmod_zadd_right_eq     -> mod_add_right_eq
nipkow@30044
  2445
zmod_zadd_self1        -> mod_add_self1
nipkow@30044
  2446
zmod_zadd_self2        -> mod_add_self2
nipkow@30224
  2447
zmod_zadd1_eq          -> mod_add_eq
nipkow@30044
  2448
zmod_zdiff1_eq         -> mod_diff_eq
nipkow@30044
  2449
zmod_zdvd_zmod         -> mod_mod_cancel
nipkow@30044
  2450
zmod_zmod_cancel       -> mod_mod_cancel
nipkow@30044
  2451
zmod_zmult_self1       -> mod_mult_self2_is_0
nipkow@30044
  2452
zmod_zmult_self2       -> mod_mult_self1_is_0
nipkow@30044
  2453
zmod_1                 -> mod_by_1
nipkow@30044
  2454
zdiv_1                 -> div_by_1
nipkow@30044
  2455
zdvd_abs1              -> abs_dvd_iff
nipkow@30044
  2456
zdvd_abs2              -> dvd_abs_iff
nipkow@30044
  2457
zdvd_refl              -> dvd_refl
nipkow@30044
  2458
zdvd_trans             -> dvd_trans
nipkow@30044
  2459
zdvd_zadd              -> dvd_add
nipkow@30044
  2460
zdvd_zdiff             -> dvd_diff
nipkow@30044
  2461
zdvd_zminus_iff        -> dvd_minus_iff
nipkow@30044
  2462
zdvd_zminus2_iff       -> minus_dvd_iff
nipkow@30044
  2463
zdvd_zmultD            -> dvd_mult_right
nipkow@30044
  2464
zdvd_zmultD2           -> dvd_mult_left
nipkow@30044
  2465
zdvd_zmult_mono        -> mult_dvd_mono
nipkow@30044
  2466
zdvd_0_right           -> dvd_0_right
nipkow@30044
  2467
zdvd_0_left            -> dvd_0_left_iff
nipkow@30044
  2468
zdvd_1_left            -> one_dvd
nipkow@30044
  2469
zminus_dvd_iff         -> minus_dvd_iff
nipkow@30044
  2470
wenzelm@30845
  2471
* Theory Rational: 'Fract k 0' now equals '0'.  INCOMPATIBILITY.
wenzelm@30845
  2472
wenzelm@30845
  2473
* The real numbers offer decimal input syntax: 12.34 is translated
wenzelm@30845
  2474
into 1234/10^2. This translation is not reversed upon output.
wenzelm@30845
  2475
wenzelm@30845
  2476
* Theory Library/Polynomial defines an abstract type 'a poly of
wenzelm@30845
  2477
univariate polynomials with coefficients of type 'a.  In addition to
wenzelm@30845
  2478
the standard ring operations, it also supports div and mod.  Code
wenzelm@30845
  2479
generation is also supported, using list-style constructors.
wenzelm@30845
  2480
wenzelm@30845
  2481
* Theory Library/Inner_Product defines a class of real_inner for real
wenzelm@30845
  2482
inner product spaces, with an overloaded operation inner :: 'a => 'a
wenzelm@30845
  2483
=> real.  Class real_inner is a subclass of real_normed_vector from
wenzelm@30845
  2484
theory RealVector.
wenzelm@30845
  2485
wenzelm@30845
  2486
* Theory Library/Product_Vector provides instances for the product
wenzelm@30845
  2487
type 'a * 'b of several classes from RealVector and Inner_Product.
wenzelm@30845
  2488
Definitions of addition, subtraction, scalar multiplication, norms,
wenzelm@30845
  2489
and inner products are included.
wenzelm@30845
  2490
wenzelm@30845
  2491
* Theory Library/Bit defines the field "bit" of integers modulo 2.  In
wenzelm@30845
  2492
addition to the field operations, numerals and case syntax are also
wenzelm@30845
  2493
supported.
wenzelm@30845
  2494
wenzelm@30845
  2495
* Theory Library/Diagonalize provides constructive version of Cantor's
wenzelm@30845
  2496
first diagonalization argument.
wenzelm@30845
  2497
wenzelm@30845
  2498
* Theory Library/GCD: Curried operations gcd, lcm (for nat) and zgcd,
wenzelm@27599
  2499
zlcm (for int); carried together from various gcd/lcm developements in
wenzelm@30845
  2500
the HOL Distribution.  Constants zgcd and zlcm replace former igcd and
wenzelm@30845
  2501
ilcm; corresponding theorems renamed accordingly.  INCOMPATIBILITY,
wenzelm@30845
  2502
may recover tupled syntax as follows:
haftmann@27556
  2503
haftmann@27556
  2504
    hide (open) const gcd
haftmann@27556
  2505
    abbreviation gcd where
haftmann@27556
  2506
      "gcd == (%(a, b). GCD.gcd a b)"
haftmann@27556
  2507
    notation (output)
haftmann@27556
  2508
      GCD.gcd ("gcd '(_, _')")
haftmann@27556
  2509
wenzelm@30845
  2510
The same works for lcm, zgcd, zlcm.
wenzelm@30845
  2511
wenzelm@30845
  2512
* Theory Library/Nat_Infinity: added addition, numeral syntax and more
wenzelm@30845
  2513
instantiations for algebraic structures.  Removed some duplicate
wenzelm@30845
  2514
theorems.  Changes in simp rules.  INCOMPATIBILITY.
wenzelm@30845
  2515
wenzelm@30845
  2516
* ML antiquotation @{code} takes a constant as argument and generates
haftmann@27651
  2517
corresponding code in background and inserts name of the corresponding
haftmann@27651
  2518
resulting ML value/function/datatype constructor binding in place.
haftmann@27651
  2519
All occurrences of @{code} with a single ML block are generated
haftmann@27651
  2520
simultaneously.  Provides a generic and safe interface for
wenzelm@30845
  2521
instrumentalizing code generation.  See
wenzelm@30845
  2522
src/HOL/Decision_Procs/Ferrack.thy for a more ambitious application.
wenzelm@30845
  2523
In future you ought to refrain from ad-hoc compiling generated SML
wenzelm@30845
  2524
code on the ML toplevel.  Note that (for technical reasons) @{code}
wenzelm@30845
  2525
cannot refer to constants for which user-defined serializations are
wenzelm@30845
  2526
set.  Refer to the corresponding ML counterpart directly in that
wenzelm@30845
  2527
cases.
wenzelm@27122
  2528
wenzelm@27122
  2529
* Command 'rep_datatype': instead of theorem names the command now
wenzelm@27122
  2530
takes a list of terms denoting the constructors of the type to be
wenzelm@27122
  2531
represented as datatype.  The characteristic theorems have to be
wenzelm@27122
  2532
proven.  INCOMPATIBILITY.  Also observe that the following theorems
wenzelm@27122
  2533
have disappeared in favour of existing ones:
wenzelm@27122
  2534
haftmann@27104
  2535
    unit_induct                 ~> unit.induct
haftmann@27104
  2536
    prod_induct                 ~> prod.induct
haftmann@27104
  2537
    sum_induct                  ~> sum.induct
haftmann@27104
  2538
    Suc_Suc_eq                  ~> nat.inject
haftmann@27104
  2539
    Suc_not_Zero Zero_not_Suc   ~> nat.distinct
haftmann@27104
  2540
haftmann@27104
  2541
ballarin@27696
  2542
*** HOL-Algebra ***
ballarin@27696
  2543
ballarin@27713
  2544
* New locales for orders and lattices where the equivalence relation
wenzelm@30106
  2545
is not restricted to equality.  INCOMPATIBILITY: all order and lattice
wenzelm@30106
  2546
locales use a record structure with field eq for the equivalence.
ballarin@27713
  2547
ballarin@27713
  2548
* New theory of factorial domains.
ballarin@27713
  2549
wenzelm@30845
  2550
* Units_l_inv and Units_r_inv are now simp rules by default.
ballarin@27696
  2551
INCOMPATIBILITY.  Simplifier proof that require deletion of l_inv
ballarin@27696
  2552
and/or r_inv will now also require deletion of these lemmas.
ballarin@27696
  2553
wenzelm@30845
  2554
* Renamed the following theorems, INCOMPATIBILITY:
wenzelm@30845
  2555
ballarin@27696
  2556
UpperD ~> Upper_memD
ballarin@27696
  2557
LowerD ~> Lower_memD
ballarin@27696
  2558
least_carrier ~> least_closed
ballarin@27696
  2559
greatest_carrier ~> greatest_closed
ballarin@27696
  2560
greatest_Lower_above ~> greatest_Lower_below
ballarin@27717
  2561
one_zero ~> carrier_one_zero
ballarin@27717
  2562
one_not_zero ~> carrier_one_not_zero  (collision with assumption)
ballarin@27696
  2563
wenzelm@27793
  2564
wenzelm@30849
  2565
*** HOL-Nominal ***
wenzelm@30849
  2566
wenzelm@30855
  2567
* Nominal datatypes can now contain type-variables.
wenzelm@30855
  2568
wenzelm@30855
  2569
* Commands 'nominal_inductive' and 'equivariance' work with local
wenzelm@30855
  2570
theory targets.
wenzelm@30855
  2571
wenzelm@30855
  2572
* Nominal primrec can now works with local theory targets and its
wenzelm@30855
  2573
specification syntax now conforms to the general format as seen in
wenzelm@30855
  2574
'inductive' etc.
wenzelm@30855
  2575
wenzelm@30855
  2576
* Method "perm_simp" honours the standard simplifier attributes
wenzelm@30855
  2577
(no_asm), (no_asm_use) etc.
wenzelm@30855
  2578
wenzelm@30855
  2579
* The new predicate #* is defined like freshness, except that on the
wenzelm@30855
  2580
left hand side can be a set or list of atoms.
wenzelm@30855
  2581
wenzelm@30855
  2582
* Experimental command 'nominal_inductive2' derives strong induction
wenzelm@30855
  2583
principles for inductive definitions.  In contrast to
wenzelm@30855
  2584
'nominal_inductive', which can only deal with a fixed number of
wenzelm@30855
  2585
binders, it can deal with arbitrary expressions standing for sets of
wenzelm@30855
  2586
atoms to be avoided.  The only inductive definition we have at the
wenzelm@30855
  2587
moment that needs this generalisation is the typing rule for Lets in
wenzelm@30855
  2588
the algorithm W:
wenzelm@30855
  2589
wenzelm@30855
  2590
 Gamma |- t1 : T1   (x,close Gamma T1)::Gamma |- t2 : T2   x#Gamma
wenzelm@30855
  2591
 -----------------------------------------------------------------
wenzelm@30855
  2592
         Gamma |- Let x be t1 in t2 : T2
wenzelm@30855
  2593
wenzelm@30855
  2594
In this rule one wants to avoid all the binders that are introduced by
wenzelm@30855
  2595
"close Gamma T1".  We are looking for other examples where this
wenzelm@30855
  2596
feature might be useful.  Please let us know.
wenzelm@30849
  2597
wenzelm@30849
  2598
huffman@30176
  2599
*** HOLCF ***
huffman@30176
  2600
huffman@30176
  2601
* Reimplemented the simplification procedure for proving continuity
huffman@30176
  2602
subgoals.  The new simproc is extensible; users can declare additional
huffman@30176
  2603
continuity introduction rules with the attribute [cont2cont].
huffman@30176
  2604
huffman@30176
  2605
* The continuity simproc now uses a different introduction rule for
huffman@30176
  2606
solving continuity subgoals on terms with lambda abstractions.  In
huffman@30176
  2607
some rare cases the new simproc may fail to solve subgoals that the
huffman@30176
  2608
old one could solve, and "simp add: cont2cont_LAM" may be necessary.
huffman@30176
  2609
Potential INCOMPATIBILITY.
huffman@30176
  2610
wenzelm@30847
  2611
* Command 'fixrec': specification syntax now conforms to the general
wenzelm@30855
  2612
format as seen in 'inductive' etc.  See src/HOLCF/ex/Fixrec_ex.thy for
wenzelm@30855
  2613
examples.  INCOMPATIBILITY.
wenzelm@30845
  2614
wenzelm@30845
  2615
wenzelm@30845
  2616
*** ZF ***
wenzelm@30845
  2617
wenzelm@30845
  2618
* Proof of Zorn's Lemma for partial orders.
huffman@30176
  2619
huffman@30176
  2620
wenzelm@27246
  2621
*** ML ***
wenzelm@28088
  2622
wenzelm@30845
  2623
* Multithreading for Poly/ML 5.1/5.2 is no longer supported, only for
wenzelm@30845
  2624
Poly/ML 5.2.1 or later.  Important note: the TimeLimit facility
wenzelm@30845
  2625
depends on multithreading, so timouts will not work before Poly/ML
wenzelm@30845
  2626
5.2.1!
wenzelm@30845
  2627
wenzelm@29161
  2628
* High-level support for concurrent ML programming, see
wenzelm@29161
  2629
src/Pure/Cuncurrent.  The data-oriented model of "future values" is
wenzelm@29161
  2630
particularly convenient to organize independent functional
wenzelm@29161
  2631
computations.  The concept of "synchronized variables" provides a
wenzelm@29161
  2632
higher-order interface for components with shared state, avoiding the
wenzelm@30845
  2633
delicate details of mutexes and condition variables.  (Requires
wenzelm@30845
  2634
Poly/ML 5.2.1 or later.)
wenzelm@30845
  2635
wenzelm@30845
  2636
* ML bindings produced via Isar commands are stored within the Isar
wenzelm@30845
  2637
context (theory or proof).  Consequently, commands like 'use' and 'ML'
wenzelm@30845
  2638
become thread-safe and work with undo as expected (concerning
wenzelm@30845
  2639
top-level bindings, not side-effects on global references).
wenzelm@30845
  2640
INCOMPATIBILITY, need to provide proper Isar context when invoking the
wenzelm@30845
  2641
compiler at runtime; really global bindings need to be given outside a
wenzelm@30845
  2642
theory.  (Requires Poly/ML 5.2 or later.)
wenzelm@30845
  2643
wenzelm@30845
  2644
* Command 'ML_prf' is analogous to 'ML' but works within a proof
wenzelm@30845
  2645
context.  Top-level ML bindings are stored within the proof context in
wenzelm@30845
  2646
a purely sequential fashion, disregarding the nested proof structure.
wenzelm@30845
  2647
ML bindings introduced by 'ML_prf' are discarded at the end of the
wenzelm@30845
  2648
proof.  (Requires Poly/ML 5.2 or later.)
wenzelm@29161
  2649
wenzelm@30530
  2650
* Simplified ML attribute and method setup, cf. functions Attrib.setup
wenzelm@30845
  2651
and Method.setup, as well as Isar commands 'attribute_setup' and
wenzelm@30547
  2652
'method_setup'.  INCOMPATIBILITY for 'method_setup', need to simplify
wenzelm@30547
  2653
existing code accordingly, or use plain 'setup' together with old
wenzelm@30547
  2654
Method.add_method.
wenzelm@30530
  2655
wenzelm@28294
  2656
* Simplified ML oracle interface Thm.add_oracle promotes 'a -> cterm
wenzelm@28294
  2657
to 'a -> thm, while results are always tagged with an authentic oracle
wenzelm@28294
  2658
name.  The Isar command 'oracle' is now polymorphic, no argument type
wenzelm@28294
  2659
is specified.  INCOMPATIBILITY, need to simplify existing oracle code
wenzelm@28294
  2660
accordingly.  Note that extra performance may be gained by producing
wenzelm@28294
  2661
the cterm carefully, avoiding slow Thm.cterm_of.
wenzelm@28294
  2662
wenzelm@30845
  2663
* Simplified interface for defining document antiquotations via
wenzelm@30845
  2664
ThyOutput.antiquotation, ThyOutput.output, and optionally
wenzelm@30845
  2665
ThyOutput.maybe_pretty_source.  INCOMPATIBILITY, need to simplify user
wenzelm@30845
  2666
antiquotatio