Iterators for applying term occurrence-level constraints in natural language searching
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United States of America Patent
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Jul 19, 2011
Grant Date -
Mar 12, 2009
app pub date -
Aug 29, 2008
filing date -
Aug 31, 2007
priority date (Note) -
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Abstract
Tools and techniques are described that relate to iterators for applying term occurrence-level constraints in natural language searching. These tools may receive a natural language input query, and define term occurrence-level constraints applicable to the input query. The methods may also identify facts requested in the input query, and may instantiate an iterator to traverse a fact index to identify candidate facts responsive to the input query. This iterator may traverse through at least a portion of the fact index. The methods may receive candidate facts from this iterator, with these candidate facts including terms, referred to as term-level occurrences. The methods may apply the term occurrence-level constraints to the term-level occurrences. The methods may select the candidate fact for inclusion in search results for the input query, based at least in part on applying the term occurrence-level constraint.
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