Difference between revisions of "ID-rule"
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| − | An ID rule ''X'' <math>\rightarrow</math> <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math> is interpreted as a well-formedness condition for [[local tree|local trees]]: It licenses all local trees with a root ''X'' and daughters <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math>. The order of the daughters dominated by ''X'' is considered to be irrelevant. | + | An ID-rule ''X'' <math>\rightarrow</math> <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math> is interpreted as a well-formedness condition for [[local tree|local trees]]: It licenses all local trees with a root ''X'' and daughters <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math>. The order of the daughters dominated by ''X'' is considered to be irrelevant. |
===See also=== | ===See also=== | ||
| Line 7: | Line 7: | ||
===Comment=== | ===Comment=== | ||
| − | + | ID-rules were first introduced in [[Generalisierte Phrasenstrukturgrammatik|Generalisierten Phrasenstrukturgrammatik]]. Moder unification-based grammar formalisms like [[Head-Driven Phrase Structure Grammar]] use a small number of highly general ID schemata instead. | |
| − | Formally, the righthand side of an ID rule can be considered as a [[multi-set|multi sets]]. | + | Formally, the righthand side of an ID-rule can be considered as a [[multi-set|multi sets]]. |
===Other Languages=== | ===Other Languages=== | ||
Revision as of 11:26, 24 September 2007
An ID-rule X <math>\rightarrow</math> <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math> is interpreted as a well-formedness condition for local trees: It licenses all local trees with a root X and daughters <math>Y_1,</math> <math>Y_2,</math> ..., <math>Y_n </math>. The order of the daughters dominated by X is considered to be irrelevant.
See also
Comment
ID-rules were first introduced in Generalisierten Phrasenstrukturgrammatik. Moder unification-based grammar formalisms like Head-Driven Phrase Structure Grammar use a small number of highly general ID schemata instead.
Formally, the righthand side of an ID-rule can be considered as a multi sets.
Other Languages
- German ID-Regel
