src/Doc/Tutorial/Documents/Documents.thy

   of \bfindex{mixfix annotations}.  Associated with any kind of
   constant declaration, mixfixes affect both the grammar productions
   for the parser and output templates for the pretty printer.
 
   In full generality, parser and pretty printer configuration is a
-  subtle affair~@{cite "isabelle-isar-ref"}.  Your syntax specifications need
+  subtle affair~\<^cite>\<open>"isabelle-isar-ref"\<close>.  Your syntax specifications need
   to interact properly with the existing setup of Isabelle/Pure and
   Isabelle/HOL\@.  To avoid creating ambiguities with existing
   elements, it is particularly important to give new syntactic
   constructs the right precedence.
 

   interpretation is left to further front-end tools.  For example, the
   Isabelle document processor (see \S\ref{sec:document-preparation})
   display the \verb,\,\verb,<forall>, symbol as~\<open>\<forall>\<close>.
 
   A list of standard Isabelle symbols is given in
-  @{cite "isabelle-isar-ref"}.  You may introduce your own
+  \<^cite>\<open>"isabelle-isar-ref"\<close>.  You may introduce your own
   interpretation of further symbols by configuring the appropriate
   front-end tool accordingly, e.g.\ by defining certain {\LaTeX}
   macros (see also \S\ref{sec:doc-prep-symbols}).  There are also a
   few predefined control symbols, such as \verb,\,\verb,<^sub>, and
   \verb,\,\verb,<^sup>, for sub- and superscript of the subsequent

 setup \<open>Sign.local_path\<close>
 (*>*)
 
 text \<open>
   It is possible to provide alternative syntax forms
-  through the \bfindex{print mode} concept~@{cite "isabelle-isar-ref"}.  By
+  through the \bfindex{print mode} concept~\<^cite>\<open>"isabelle-isar-ref"\<close>.  By
   convention, the mode of ``$xsymbols$'' is enabled whenever
   Proof~General's X-Symbol mode or {\LaTeX} output is active.  Now
   consider the following hybrid declaration of \<open>xor\<close>:
 \<close>
 

 
 subsection \<open>Prefix Annotations\<close>
 
 text \<open>
   Prefix syntax annotations\index{prefix annotation} are another form
-  of mixfixes @{cite "isabelle-isar-ref"}, without any template arguments or
+  of mixfixes \<^cite>\<open>"isabelle-isar-ref"\<close>, without any template arguments or
   priorities --- just some literal syntax.  The following example
   associates common symbols with the constructors of a datatype.
 \<close>
 
 datatype currency =

 large hierarchies of concepts. Abbreviations do not replace
 definitions.
 
 Abbreviations are a simplified form of the general concept of
 \emph{syntax translations}; even heavier transformations may be
-written in ML @{cite "isabelle-isar-ref"}.
+written in ML \<^cite>\<open>"isabelle-isar-ref"\<close>.
 \<close>
 
 
 section \<open>Document Preparation \label{sec:document-preparation}\<close>
 

   \medskip The easiest way to manage Isabelle sessions is via
   \texttt{isabelle mkroot} (to generate an initial session source
   setup) and \texttt{isabelle build} (to run sessions as specified in
   the corresponding \texttt{ROOT} file).  These Isabelle tools are
   described in further detail in the \emph{Isabelle System Manual}
-  @{cite "isabelle-system"}.
+  \<^cite>\<open>"isabelle-system"\<close>.
 
   For example, a new session \texttt{MySession} (with document
   preparation) may be produced as follows:
 
 \begin{verbatim}

 
   \medskip Any additional files for the {\LaTeX} stage go into the
   \texttt{MySession/document} directory as well.  In particular,
   adding a file named \texttt{root.bib} causes an automatic run of
   \texttt{bibtex} to process a bibliographic database; see also
-  \texttt{isabelle document} @{cite "isabelle-system"}.
+  \texttt{isabelle document} \<^cite>\<open>"isabelle-system"\<close>.
 
   \medskip Any failure of the document preparation phase in an
   Isabelle batch session leaves the generated sources in their target
   location, identified by the accompanying error message.  This lets
   you trace {\LaTeX} problems with the generated files at hand.

   text that are associated with formal Isabelle/Isar commands
   (\bfindex{marginal comments}), or as standalone paragraphs within a
   theory or proof context (\bfindex{text blocks}).
 
   \medskip Marginal comments are part of each command's concrete
-  syntax @{cite "isabelle-isar-ref"}; the common form is ``\verb,--,~$text$''
+  syntax \<^cite>\<open>"isabelle-isar-ref"\<close>; the common form is ``\verb,--,~$text$''
   where $text$ is delimited by \verb,",\<open>\<dots>\<close>\verb,", or
   \verb,{,\verb,*,~\<open>\<dots>\<close>~\verb,*,\verb,}, as before.  Multiple
   marginal comments may be given at the same time.  Here is a simple
   example:
 \<close>

   may acquire different typings due to constraints imposed by their
   environment; within a proof, for example, variables are given the
   same types as they have in the main goal statement.
 
   \medskip Several further kinds of antiquotations and options are
-  available @{cite "isabelle-isar-ref"}.  Here are a few commonly used
+  available \<^cite>\<open>"isabelle-isar-ref"\<close>.  Here are a few commonly used
   combinations:
 
   \medskip
 
   \begin{tabular}{ll}

   As has been pointed out before (\S\ref{sec:syntax-symbols}),
   Isabelle symbols are the smallest syntactic entities --- a
   straightforward generalization of ASCII characters.  While Isabelle
   does not impose any interpretation of the infinite collection of
   named symbols, {\LaTeX} documents use canonical glyphs for certain
-  standard symbols @{cite "isabelle-isar-ref"}.
+  standard symbols \<^cite>\<open>"isabelle-isar-ref"\<close>.
 
   The {\LaTeX} code produced from Isabelle text follows a simple
   scheme.  You can tune the final appearance by redefining certain
   macros, say in \texttt{root.tex} of the document.
 

   Tags observe the structure of proofs; adjacent commands with the
   same tag are joined into a single region.  The Isabelle document
   preparation system allows the user to specify how to interpret a
   tagged region, in order to keep, drop, or fold the corresponding
   parts of the document.  See the \emph{Isabelle System Manual}
-  @{cite "isabelle-system"} for further details, especially on
+  \<^cite>\<open>"isabelle-system"\<close> for further details, especially on
   \texttt{isabelle build} and \texttt{isabelle document}.
 
   Ignored material is specified by delimiting the original formal
   source with special source comments
   \verb,(,\verb,*,\verb,<,\verb,*,\verb,), and