DelphinTutorial_Grammars

DELPH-IN Grammars

A DELPH-IN grammar consists of a set of grammar entities which together license a set of strings together with linguistic structures for each string representing morphological, syntactic and semantic information.

The grammar entities bear declarative constraints which encode well-formedness restrictions as well as compositional semantics. There are three major categories of grammar entities:

• lexical entries giving form/meaning information about particular lemmas

• lexical rules which build words from lemmas and can add syntactic, semantic, and orthogaphic information

• phrase structure rules which build larger constituents from words

In addition, there are also two further categories of grammar entities:

• root symbols which any spanning edge must unify with to be output as a parse

• node labels used in the display of abbreviated trees