A Modification of the Earley-Shieber Algorithm for Direct Parsing of ID/LP Grammars

Immediate Dominance/Linear Precedence (ID/LP) Grammar is a formalism that has recently been developed within the framework of Generalized Phrase Structure Grammar (GPSG) as presented by Gazdar/Pullum (1982). The carefully described formal properties and the restricted power of GPSG have made it a focal point of interest in the parsing of natural language. Of the various devices introduced in GPSG only the ID/LP formalism will be discussed in this paper. [1]