How to Use This Reference

This chapter consists of examples of XML documents and DTDs, followed by detailed reference sections that describe every feature of the XML specification and a listing of possible well-formedness and validity errors. The syntax items of XML are introduced in the rough order in which they appear in an XML document. Each entry explains the syntactic structure, where it can be used, and the applicable validity and well-formedness constraints. Each reference section contains a description of the XML language structure, an informal syntax, and an example of the syntax’s usage where appropriate.

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