Natural Language Parser Demo -- About

Natural Language Parser Demo

Parser technology

This natural language parser utilizes the definitions (a part of the definitions) of English syntax made by the Linguistic String Project. The parser implements a top-down strategy and uses already parsed constructions when possible.

For more information about the grammar, see:

Sager, N. (1981). Natural Language Information Processing: A Computer Grammar of English and Its Applications. Addison-Wesley, Reading, Mass.

Grishman, R. (1986). Computational linguistics: An introduction. Cambridge University Press.

The Lexicon

The lexicon in this system is a collection of words from WordNet and Link Grammar added with many new features and entries to meet the parser requirements. A portion of each source is used in the final database.

Flow chart

                       Input text
                           |
                           |
                  ---------------------
                     Lexical analyzer  - lexicon lookups
Lexicons   -------                     - merges dictionaries
                                       - morphological processing
                                       - sentence detector
                  ---------------------
                           |
                     sentences/phrases
                     word stacks
                           |
                  ---------------------
Syntax (BNF) -----      Parser         - full syntactic parsing/
                                         partial parsing
                                       - restrictions
                                       - rating
                  ---------------------
                           |
                        parses
                           |
                                 [word sense disambiguation]
                                 [reference resolution]
                                 [transformations]
                  ---------------------
                      Applications     - machine translation
                                       - xml annotation
                                       - query analysis
                                       - information extraction

Similar Projects

Wordnets:

A Complete Multilingual WordNet List by Language