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Ranking document fragments in XML Retrieval : an empirical study

In the XML retrieval paradigm, document fragments may be returned as answers to a user query. This information being more specific than whole documents may therefore reduce the user effort for finding relevant information. However, since XML documents are composed of nested elements, many of which being possibly relevant to the user information need, retrieval systems must take care of the overlap between returned elements. In this paper, we consider this filtering problem. We first review related work from the IR literature. We then propose a framework for XML retrieval filtering and describe some ideas for this filtering process.