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Common Desktop Environment: Help System Author's and Programmer's Guide > Chapter 7 Reading the DocBook Document Type Definition

Document Type Defintion

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A Document Type Definition (DTD) defines a set of elements used to create a structured (or hierarchical) document. The DTD specifies the syntax for each element and governs how and where elements can be used in a document.

DocBook 2.1 DTD

The DocBook 2.2.1 DTD tag set and its associated rules are referred to as formal markup. The DTD conforms to the Standard Generalized Markup Language (SGML) ISO specification 8879:1986. This means that you can use formal markup to create help files that are SGML compliant.

Appendix A contains the complete DTD specification. The DTD is also available in the Developer's Toolkit. It is located in the /usr/dt/dthelp/dtdocbook/SGML directory and is named DocBook.dtd.

See Also

  • dtdocbookdtd(4) man page.

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