Editing Lexical functional grammar (section)

{{Short description|Grammar framework in theoretical linguistics}}
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'''Lexical functional grammar''' ('''LFG''') is a [[Constraint-based grammar|constraint-based]] [[grammar framework]] in [[theoretical linguistics]]. It posits two separate levels of syntactic structure, a [[phrase structure grammar]] representation of word order and constituency, and a representation of grammatical functions such as subject and object, similar to [[dependency grammar]]. The development of the theory was initiated by [[Joan Bresnan]] and [[Ronald Kaplan]] in the 1970s, in reaction to the theory of [[transformational grammar]] which was current in the late 1970s. It mainly focuses on [[syntax]], including its relation with [[Morphology (linguistics)|morphology]] and [[semantics]]. There has been little LFG work on [[phonology]] (although ideas from [[optimality theory]] have recently been popular in LFG research).