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Spatial has always maintained the concept of a current version (release) number in
ACIS, as well as a save version number. The save version allows one to create a SAT save file that can be read by a previous version of
ACIS.
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Beginning with
ACIS Release 4.0, the SAT save file format does not change with minor releases, only with major releases. This allows applications that are based upon the same major version of
ACIS to exchange data without being concerned about the save version. To provide this interoperability in a simple implementation,
ACIS save files have contained a symbol that accurately identified the major version number, but not the minor version. This meant that applications created using the same major version of
ACIS would produce compatible save files, regardless of their minor versions. This was accomplished by simply not incrementing the "internal" minor version number between major versions.
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Beginning with Release 7.0,
ACIS will again provide accurate major, minor, and point version numbers, which can be queried using the functions
get_major_version,
get_minor_version, and
get_point_version. To summarize how release numbers and SAT changes are related:
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Major release: SAT file changes may be made; significant functionality changes likely; may require significant changes to existing applications
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Minor release: No SAT file changes are made; may provide new functionality; may require some minimal changes to existing applications
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Point release: Minor changes only (bug fixes)
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