Integrating and querying distributed XML data via XLink
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摘要
XML instances are not necessarily self-contained but may have connections to remote XML data residing on other servers. In this paper, we show that—in spite of its minor support and use in the XML world—the XLink language provides a powerful mechanism for expressing such links both from the modeling point of view and for actually querying interlinked XML data: in our dbxlink approach, the links are not seen as explicit links (where the users must be aware of the links and traverse them explicitly in their queries), but define views that combine into a logical, transparent XML model which serves as an external schema and can be queried by XPath/XQuery. We motivate the underlying modeling and give a concise and declarative specification as an XML-to-XML mapping. We also describe the implementation of the model as an extension of the eXist [eXist: an Open Source Native XML Database, http://exist-db.org/] XML database system. The approach can be applied both for distribution of data and for integration of data from autonomous sources.
论文关键词:XML,Distributed Data,Data Integration,Querying XML
论文评审过程:Received 11 December 2006, Revised 26 October 2007, Accepted 5 February 2008, Available online 10 March 2008.
论文官网地址:https://doi.org/10.1016/j.is.2008.02.003