Improving Document Ranking for Long Queries with Nested Query Segmentation
نویسندگان
چکیده
In this research, we explore nested or hierarchical query segmentation, where segments are defined recursively as consisting of contiguous sequences of segments or query words, as a more effective representation of a query. We design a lightweight and unsupervised nested segmentation scheme, and propose how to use the tree arising out of the nested representation of a query to improve ranking performance. We show that nested segmentation can lead to significant gains over stateof-the-art flat segmentation strategies.
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