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EricZinda edited this page Jun 30, 2023 · 3 revisions

Grammar Engineering Frequently Asked Questions

The LKB seems to be "forgetting" a constraint/definition I've coded. Why?

If you've coded a constraint in tdl but it isn't reflected in the LKB (there's no change to your grammar's behavior; when you look at an entry--rule, lexical entry, etc.--or a type which should be subject to the constraint using the View menu, you don't see the constraint), check the following:

  • Have you reloaded the grammar since you made the change?

  • Have you saved the tdl file you added the change to, before loading the grammar?

  • Does the entry you're considering actually inherit from the type you've put the constraint on? (Double check in lexicon.tdl, rules.tdl, irules.tdl, lrules.tdl, whichever is relevant.)

  • Do you have multiple types with the same name? If so, only the last one will "count" -- it will overwrite what came before. You can use the search function in emacs to check whether this it the case.

  • Have you misspelled an outermost feature name (e.g., SYSNEM for SYNSEM)?

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