SICStus Prolog 4 has been released. SICStus Prolog is a multiplatform ISO Prolog implementation.
This release includes: the dropping of native code compilation, execution speed improvements, the removal of certain memory limitations that existed in release 3, full commitment to the ISO Prolog standard, the renaming of the '#' operator to '\', support for atoms that contain the NUL character, new 'total_runtime' and 'defragmentation' keywords, changes to the set of built-in predicates, library changes, changes to the foreign language APIs, and other changes.
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