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Encyclopedia of Library and Information Sciences, Third Edition
Nowadays, increasingly, documents are marked-up using XML, the format standard for structured documents. In contrast to HTML, which is mainly layoutoriented, XML follows the fundamental concept of separating the logical structure of a document from its layout. This document logical structure can be exploited to allow a focused access to documents, where the aim is to return the most relevant fragments within documents as answers to queries, instead of whole documents. This article describesdoi:10.1081/e-elis3-120043691 fatcat:kjsqvk2s6bgtpjrca4aef5u2mi