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Erschienen in:
2015 | OriginalPaper | Buchkapitel
On Identifying Phrases Using Collection Statistics
verfasst von : Simon Gog, Alistair Moffat, Matthias Petri
Erschienen in: Advances in Information Retrieval
Verlag: Springer International Publishing
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The use of phrases as part of similarity computations can enhance search effectiveness. But the gain comes at a cost, either in terms of index size, if all word-tuples are treated as queryable objects; or in terms of processing time, if postings lists for phrases are constructed at query time. There is also a lack of clarity as to which phrases are “interesting”, in the sense of capturing useful information. Here we explore several techniques for recognizing phrases using statistics of large-scale collections, and evaluate their quality.