The organization of the lexicon, and especially the relations between groups of lexemes is a strongly debated topic in linguistics. Some authors have insisted o

Lexical Functional Grammar (LFG) is a nontransformational theory of linguistic structure, first developed in the 1970s by Joan Bresnan and Ronald M. Kaplan, whi

Head-Driven Phrase Structure Grammar (HPSG) is a constraint-based or declarative approach to linguistic knowledge, which analyses all descriptive levels (phonol

In most grammatical models, hierarchical structuring and dependencies are considered as central features of grammatical structures, an idea which is usually cap

This book examines extractions out of the subject, which is traditionally considered to be an island for extraction. There is a debate among linguists regarding