LP-rule

LP-rules restrict the set of local trees admitted by an ID-rule. An LD-rule X $$\prec$$ Y states that category X has to precede category Y. It licenses all local trees containing a daughter labelled X and a daughter labelled Y, with X preceding Y.

Examples
The LP-rue ''V $$\prec$$ NP' states that the object has to follow the verb.

Comment
LD-rules were first introduced in Generalized Phrase Structure Grammar.

Other Languages

 * German LP-Regel