ID-rule

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

• Generalized Phrase Structure Grammar
• ID/LP rules
• LP-rule

Comment

Das Konzept der ID-Regel wurde ursprünglich im Rahmen der Generalisierten Phrasenstrukturgrammatik entwickelt. Instead of ID rules, Head-Driven Phrase Structure Grammar uses so-called ID schemata.

Formally, the righthand side of an ID rule can be considered as a multi sets.

Other Languages

• German ID-Regel