Difference between revisions of "Feature cooccurrence restrictions"
Jump to navigation
Jump to search
| Line 2: | Line 2: | ||
===Example=== | ===Example=== | ||
| − | Only verbal catgories can contain the feature ''vform'': | + | 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] | |
| − | |||
| − | |||
| − | Phrasal catgories can not contain the feature ''subcat'' | ||
| − | |||
| − | [BAR 2] <math>\rightarrow</math> <math>\neg</math> [SUBCAT] | ||
| + | ===Comments=== | ||
| + | Modern unification grammar formalisms like [[Head-Driven Phrase Structure Grammar]] use typed feature strcutures instead. | ||
===Other Languages=== | ===Other Languages=== | ||
Revision as of 10:22, 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 grammar formalisms like Head-Driven Phrase Structure Grammar use typed feature strcutures instead.
