Difference between revisions of "Feature cooccurrence restrictions"
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| − | '''Feature cooccurrence restrictions''' (FCRs) formulate well-formedness conditions for feature structures | + | [[Generalized Phrase Structure Grammar]] (GPSG) uses '''Feature cooccurrence restrictions''' (FCRs) to formulate well-formedness conditions for feature structures. As GPSG takes feature structures to be arbitrary sets 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=== | ===Example=== | ||
Revision as of 10:36, 21 September 2007
Generalized Phrase Structure Grammar (GPSG) uses Feature cooccurrence restrictions (FCRs) to formulate well-formedness conditions for feature structures. As GPSG takes feature structures to be arbitrary sets 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.
