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CIKM
2009
Springer

Effective and efficient structured retrieval

9 years 9 months ago
Effective and efficient structured retrieval
Search engines that support structured documents typically support structure created by the author (e.g., title, section), and may also support structure added by an annotation process (e.g., part of speech, named entity, semantic role). Exploiting such structure can be difficult. Query structure may fail to match structure in a relevant document for a variety of reasons, thus structured queries, although containing more information than keyword queries, are often less effective than unstructured queries. This paper studies retrieval of sentences with annotations for a question answering task. Three problems of structured retrieval are identified and solutions proposed. Structural mismatch is addressed by query structure expansion of predicted relevant structures. Lack of presence of all key aspects of a question is solved by Boolean filtering of result sentences. The score variations of the annotator generated fields with all the different lengths are accounted for by using field spe...
Le Zhao, Jamie Callan
Added 26 May 2010
Updated 26 May 2010
Type Conference
Year 2009
Where CIKM
Authors Le Zhao, Jamie Callan
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