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Introduction
The Extensible Markup Language (XML) is a data format for structured document interchange on the Web and other networks. It is hardware architecture neutral and application independent. XML documents are composed of storage units called entities, that contain either parsed or unparsed data. Parsed data is made up of characters, some of which form character data, and some of which form markup. Markup encodes a description of a document’s storage layout and logical structure.
A software module called an XML processor is used to read XML documents and provide access to their content and structure. It is assumed that an XML processor is doing its work on behalf of another module call the application.
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