Best-Match Querying from Document-Centric XML

On the Web, there is a pervasive use of XML to give lightweight semantics to textual collections. Such documentcentric XML collections require a query language that can gracefully handle structural constraints as well as constraints on the free text of the documents. Our main contributions are three-fold. First, we outline two fragments of XPath tailored to users that have varying degrees of understanding of the XML structure used, and give both syntactic and semantic characterizations of these fragments. Second, we extend XPath with an about function having a best-match semantics based on the relevance of the document component for the expressed information need. Third, we evaluate the resulting query language using the INEX 2003 test suite, and show that best-match approaches outperform exact-match approaches for evaluating content-and-structure queries. General Terms Full-text XML querying, XPath, XML Retrieval

• Type: Conference
• Year: 2004
• Where: WEBDB
• Authors: Jaap Kamps, Maarten Marx, Maarten de Rijke, Börkur Sigurbjörnsson
• Keywords: Internet Technology, Query Language, Such Documentcentric Xml, Terms Full-text XML, WEBDB 2004