Dependency grammar (DG) is a class of syntactic
theories developed by Lucien
Tesnière. It is distinct from phrase
structure grammars, as it lacks phrasal nodes. Structure
is determined by the relation between a word (a head)
and its dependents. Dependency grammars are not defined
by a specific word order, and are thus well suited to
languages with freer word order, such as Czech.
syntax and Extensible
Dependency Grammar are types of dependency grammar.
grammar is similar to dependency grammar, but link
grammar includes directionality in the relations between
words, as well as lacking a head-dependent relationship.
Grammar differs from other dependency grammars in
that it is also a theory of semantics
This theory posits a large collection of reductions (small
that map dependency structures into compact, variant forms.
It also reverses the direction of dependency, by having
(e.g. verbs) depend on their arguments.