2014-02-11 ago report (but ignore) markup within auxiliary files;
2013-12-05 ago more uniform status -- accommodate spurious Exn.Interrupt from user code, allow ML_Compiler.exn_messages_id to crash;
2013-12-05 ago merged, resolving obvious conflicts in NEWS and src/Pure/System/isabelle_process.ML;
2013-11-28 ago more official task context via Task_Queue.enroll, which is required to participate in group cancellation (e.g. to terminate command exec);
2013-11-25 ago more defensive order of Markup.failed vs. Markup.finished -- more informative status in Isabelle/Scala, although it is not rendered in Isabelle/jEdit;
2013-11-20 ago register actual group of nested worker context -- relevant for insulated cancellation of exec_ids (see also 78693e46a237, e0169f13bd37);
2013-11-20 ago proper static resolution of files via Thy_Load.load_thy, instead of TTY fall-back;
2013-11-20 ago load files that are not provided by PIDE blobs;
2013-11-19 ago more uniform handling of inlined files;
2013-11-19 ago release file errors at runtime: Command.eval instead of;
2013-11-19 ago maintain blobs within document state: digest + text in ML, digest-only in Scala;
2013-09-29 ago low-priority print task is always asynchronous -- relevant for single-core machine and automatically tried tools;
2013-09-18 ago improved printing of exception trace in Poly/ML 5.5.1;
2013-09-04 ago non-persistent print_state: trade-off between JVM space vs. ML time;
2013-09-03 ago Execution.fork formally requires registered Execution.running;
2013-08-25 ago maintain goal forks as part of global execution;
2013-08-25 ago discontinued parallel_subproofs_saturation and related internal counters (superseded by parallel_subproofs_threshold and timing information);
2013-08-13 ago more explicit error, e.g. for sledgehammer query operation applied in non-HOL session;
2013-08-10 ago explicit "strict" flag for print functions (flipped internal meaning);
2013-08-02 ago prefer canonical order, to avoid potential fluctuation due to front-end edits;
2013-08-02 ago support print functions with explicit arguments, as provided by overlays;
2013-07-30 ago tuned;
2013-07-30 ago de-assign execs that were not registered as running yet -- observe change of perspective more thoroughly;
2013-07-29 ago keep memo_exec execution running, which is important to cancel goal forks eventually;
2013-07-29 ago maintain explicit execution frontier: avoid conflict with former task via static dependency;
2013-07-29 ago clarified conditions for node traversal;
2013-07-29 ago tuned signature;
2013-07-29 ago discontinued notion of "stable" result -- running execution is never canceled;
2013-07-20 ago print_state at high priority -- fast and important;
2013-07-15 ago tuned;
2013-07-15 ago keep persistent prints only if actually finished;
2013-07-13 ago initial delay for automatically tried tools;
2013-07-13 ago determine print function parameters dynamically, e.g. depending on runtime options;
2013-07-12 ago reraise interrupts outside command regular transactions -- relevant for memo_stable;
2013-07-12 ago clarified memo_exec: plain synchronized access without any special tricks;
2013-07-12 ago clarified execution: maintain running execs only, check "stable" separately via memo (again);
2013-07-12 ago tuned signature;
2013-07-12 ago clarified module name;
2013-07-11 ago more explicit type Exec.context;
2013-07-11 ago strictly monotonic Document.update: avoid disruptive cancel_execution, merely discontinue_execution and cancel/terminate old execs individually;
2013-07-11 ago more abstract types;
2013-07-11 ago disallow concurrent execution attempt explicitly -- it should never happen due to management of singleton execution;
2013-07-11 ago global management of command execution fragments;
2013-07-11 ago tuned;
2013-07-10 ago print "persistent" flag allows to adjust tradeoff of ML run-time vs. JVM heap-space;
2013-07-10 ago allow to remove print functions;
2013-07-10 ago clarified Command.print: update old prints here;
2013-07-09 ago more formal type assign_update: avoid duplicate results and redundant update of global State.execs;
2013-07-08 ago more direct interleaving of eval/print and update/execution -- refrain from crude manipulation of max_threads;
2013-07-05 ago tuned signature;
2013-07-05 ago tuned signature -- eliminated pointless type synonym;
2013-07-05 ago tuned signature;
2013-07-05 ago clarified type Command.eval;
2013-07-05 ago tuned signature;
2013-07-05 ago explicit module Document_ID as source of globally unique identifiers across ML/Scala;
2013-07-04 ago separate exec_id assignment for Command.print states, without affecting result of eval;
2013-07-04 ago more Command.memo operations;
2013-07-03 ago more exception handling -- make print functions total;
2013-07-03 ago more print function parameters;
2013-07-03 ago allow multiple print functions;