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CS60057 Speech &Natural Language Processing

CS60057 Speech &Natural Language Processing

CS60057 Speech &Natural Language Processing. Autumn 2007. Lecture 16 5 September 2007. Parsing with features. We need to constrain the rules in CFGs, for example to coerce agreement within and between constituents to pass features around to enforce subcategorisation constraints

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1.04k views • 91 slides
CS60057 Speech &Natural Language Processing

CS60057 Speech &Natural Language Processing

CS60057 Speech &Natural Language Processing. Autumn 2007. Lecture 16 5 September 2007. Parsing with features. We need to constrain the rules in CFGs, for example to coerce agreement within and between constituents to pass features around to enforce subcategorisation constraints

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900 views • 75 slides
CS4025: Grammars

CS4025: Grammars

CS4025: Grammars. Grammars for English Features Definite Clause Grammars See J&M Chapter 9 in 1 st ed, 12 in 2 nd , Prolog textbooks (for DCGs). Grammar: Definition. The surface structure (syntax) of sentences is usually described by some kind of grammar .

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440 views • 30 slides
Context-Free Parsing

Context-Free Parsing

Context-Free Parsing. Part 2 Features and Unification. Parsing with features. We need to constrain the rules in CFGs, for example to coerce agreement within and between constituents to pass features around to enforce subcategorisation constraints

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217 views • 21 slides
Computational Linguistics Introduction

Computational Linguistics Introduction

Computational Linguistics Introduction. Context Free Grammars. Chomsky Hierarchy. Weak Equivalence. A grammar should generate all and only sentences in the language under investigation. Let H be language under investigation and G be the grammar we are developing.

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298 views • 20 slides
CSA2050: Introduction to Computational Linguistics

CSA2050: Introduction to Computational Linguistics

CSA2050: Introduction to Computational Linguistics. Evaluation Criteria for CFGs Limitations of CFGs Introduction to PATR2. Weak and Strong Equivalence. A grammar/lexicon G generates a characteristic language L(G) Grammars G1 and G2 are said to be weakly equivalent if L(G1) = L(G2)

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278 views • 15 slides

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