Alloy 6 uses new symbols (exactly two: the single quote ' and the semicolon ;) and several new keywords (as well as ones reserved for possible future extensions) listed below in alphabetical order:
after always before enabled event eventually historically invariant modifies once releases since steps triggered until var
Alloy 6 is compatible with old models as long as they don’t use these symbols or keywords. On the other hand, if an old model of yours uses single quotes or some of these keywords (as identifiers), then you will have to replace them to ensure that Alloy 6 interprets your model as before (for instance changing var into var_ or variable or foo). Notice the single quote can for instance be replaced with the double quote symbol " (which is legal Alloy).
Pinned Comments
ADSWT518 commented on 2022-05-13 03:37 (UTC) (edited on 2022-05-13 03:38 (UTC) by ADSWT518)
Alloy 6 uses new symbols (exactly two: the single quote ' and the semicolon ;) and several new keywords (as well as ones reserved for possible future extensions) listed below in alphabetical order:
Alloy 6 is compatible with old models as long as they don’t use these symbols or keywords. On the other hand, if an old model of yours uses single quotes or some of these keywords (as identifiers), then you will have to replace them to ensure that Alloy 6 interprets your model as before (for instance changing var into var_ or variable or foo). Notice the single quote can for instance be replaced with the double quote symbol " (which is legal Alloy).
ref: http://alloytools.org/alloy6.html