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Hiemstra, D. and Klinger, S. and Rode, H. and Flokstra, Jan and Apers, P.M.G.
(2008)
Sound ranking algorithms for XML search.
In: Proceedings of the 2nd SIGIR workshop on Focused Retrieval, 24 Jul 2008, Singapore.
pp. 15-21.
University of Otago.
ISBN 978-0-473-13468-6
Full text available as:
Official URL: http://www.cs.otago.ac.nz/sigirfocus2008/  AbstractRanking algorithms for XML should reflect the actual combined content and structure constraints of queries, while at the same time producing equal rankings for queries that are semantically equal. Ranking algorithms that produce different rankings for queries that are semantically equal are easily detected by tests on large databases: We call such algorithms not sound. We report the behavior of different approaches to ranking content-and-structure queries on pairs of queries for which we expect equal ranking results from the query semantics. We show that most of these approaches are not sound. Of the remaining approaches, only 3 adhere to the W3C XQuery Full-Text standard.
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