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:
“As if the musicians did not so much play the little phrase as execute the rites required by it to appear, and they proceeded to the necessary incantations to obtain and prolong for a few instants the miracle of its evocation, Swann, who could no more see the phrase than if it belonged to an ultraviolet world ... Swann felt it as a presence, as a protective goddess and a confidante to his love, who to arrive to him ... had clothed the disguise of this sonorous appearance.”
—Marcel Proust (1871–1922)
“Who says that fictions only and false hair
Become a verse? Is there in truth no beauty?
Is all good structure in a winding stair?
May no lines pass, except they do their duty
Not to a true, but painted chair?”
—George Herbert (1593–1633)
“Playing games with agreed upon rules helps children learn to live by rules, establish the delicate balance between competition and cooperation, between fair play and justice and exploitation and abuse of these for personal gain. It helps them learn to manage the warmth of winning and the hurt of losing; it helps them to believe that there will be another chance to win the next time.”
—James P. Comer (20th century)