Phrase Structure Rules
Phrase-structure rules are a way to describe a given language's syntax and are closely associated with the early stages of Transformational Grammar. They are used to break down a natural language sentence into its constituent parts (also known as syntactic categories) namely phrasal categories and lexical categories (aka parts of speech). A grammar that uses phrase structure rules is a type of phrase structure grammar - except in computer science, where it is known as just a grammar, usually context-free. Phrase structure rules as they are commonly employed operate according to the constituency relation and a grammar that employs phrase structures rules is therefore a constituency grammar and as such, it stands in contrast to dependency grammars, which are based on the dependency relation.
Read more about Phrase Structure Rules: Definition, Top Down
Famous quotes containing the words phrase, structure and/or rules:
“And what, then, is belief? It is the demi-cadence which closes a musical phrase in the symphony of our intellectual life.”
—Charles Sanders Peirce (1839–1914)
“If rightly made, a boat would be a sort of amphibious animal, a creature of two elements, related by one half its structure to some swift and shapely fish, and by the other to some strong-winged and graceful bird.”
—Henry David Thoreau (1817–1862)
“Ideas about life organize perception; names of emotions organize sensations; rules of syntax organize thought. But pain comes on its own.”
—Mason Cooley (b. 1927)