Information extraction using a trainable grammar
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United States of America Patent
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Issued Date -
Nov 9, 2006
app pub date -
Nov 7, 2005
filing date -
Nov 8, 2004
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Abandoned
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Abstract
A computer-implemented method for information extraction includes defining a stochastic context free grammar (SCFG) including symbols and rules applicable to the symbols, the symbols including at least one output concept. The SCFG is trained on a tagged training corpus so as to determine probabilities of the rules and of one or more of the symbols. A document is parsed using the rules and symbols responsively to the probabilities so as to extract occurrences of the at least one output concept from the document.
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