Difference between revisions of "Feature cooccurrence restrictions"
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===Comments=== | ===Comments=== | ||
| − | Modern unification grammar formalisms like [[Head-Driven Phrase Structure Grammar]] use typed feature | + | Modern unification-based grammar formalisms like [[Head-Driven Phrase Structure Grammar]] use [[typed feature structures]] instead. |
===Other Languages=== | ===Other Languages=== | ||
Revision as of 10:25, 21 September 2007
Feature cooccurrence restrictions (FCRs) formulate well-formedness conditions for feature structures used by Generalized Phrase Structure Grammar. As a feature structure in this approach is taken to be an arbitrary set of feature specifications, it is necessary to block the combination of feature specifications which from a linguistic point of view make no sense. Most FCRs are formulated as implications.
Example
Only verbal catgories can contain the feature vform: [VFORM] <math>\rightarrow</math> [+V, -N]
Phrasal catgories can not contain the feature subcat: [BAR 2] <math>\rightarrow</math> <math>\neg</math> [SUBCAT]
Comments
Modern unification-based grammar formalisms like Head-Driven Phrase Structure Grammar use typed feature structures instead.
