Temporal queries and version management in XML-based document archives

Fusheng Wang, Carlo Zaniolo
<span title="">2008</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/ueo4clepdnbdzhqnuojj57edri" style="color: black;">Data &amp; Knowledge Engineering</a> </i> &nbsp;
10 By storing the successive versions of a document in an incremental fashion, XML repositories and data warehouses 11 achieve: (i) the efficient preservation of critical information and (ii) the ability to support historical queries on the evolution 12 of documents and their contents. In this paper, we present efficient techniques for managing multi-version document his-13 tories and supporting powerful temporal queries on such documents. Our approach consists of: (i) concisely representing 14
more &raquo; ... the successive versions of a document as an XML document that implements a temporally-grouped data model and (ii) 15 using XML query languages, such as XQuery, to express complex queries on the content of a particular version, and 16 on the temporal evolution of the document elements and contents. We show that the data definition and manipulation 17 framework of XML and XQuery can effectively support temporal models and historical queries without requiring exten-18 sions to the current standards; in fact, this approach is effective at representing and querying the histories of relational 19 database tables, which are difficult to manage using SQL. These conclusions emerge through a number of interesting case 20 studies presented in this paper that include W3C documents, the UCLA course catalog, and the CIA World Factbook. 21 Ó 2007 Published by Elsevier B.V. 22
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