Dtd

XML and Its Data Model

XML (Extensible Markup Language) is a tag-based notation for "marking" documents, much similar to the familiar HTML or less familiar SGML. A document is nothing more nor less than a file of characters. However, while HMTL's tags talk about the presentation of the information

Document Type Definitions

In order for a computer to process XML documents automatically, there needs to be something like a schema for the documents. That is, we need to be told what tags can appear in a collection of documents and how tags can be nested. The description of the schema is given by a

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