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Introducing Microsoft® Office InfoPath™ 2003 by Roger Jennings

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Validating Documents with XML Schemas

XML is a simplified subset of the Standard Generalized Markup Language (SGML), which is an international standard document publishing format. SGML originated in the late 1980s and remains widely used for publishing complex documents, such as commercial aircraft maintenance manuals. The U.S. Government Printing Office uses SGML to publish the Federal Register and other official documents. SGML requires document type definitions (DTDs) to define the tags used for specifying the content and formatting of documents. One of the purposes of a DTD is to validate documents; validation means testing the contents of a document for conformance to a set of rules expressed in the DTD. A software module called a parser ...

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