Abstract
Combining evidence of relevance coming from two sources -- a keyword index and a keyphrase index -- has been a fundamental part of our INEX-related experiments on XML Retrieval over the past years. In 2008, we focused on improving the quality of the keyphrase index and finding better ways to use it together with the keyword index even when processing non-phrase queries. We also updated our implementation of the word index which now uses a state-of-the-art scoring function for estimating the relevance of XML elements. Compared to the results from previous years, the improvements turned out to be successful in the INEX 2008 ad hoc track evaluation of the focused retrieval task.
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