Basic HTML version of Foils prepared May 19 99

Foil 16 Document Type Definition

From An Introduction to XML Basic Information Track Computational Science Course CPS616 -- Spring Semester 1999. by Nancy McCracken,Ozgur Balsoy, Tom Scavo
The DTD specifies the logical structure of the document; it is a formal grammar describing document syntax and semantics
The DTD does not describe the physical layout of the document; this is left to the style sheets and the scripts
It is no mean task to write a DTD, so most users will adopt predefined DTDs
DTDs can be written in separate files to facilitate re-use.
Content-providers, industries and other groups can collaborate to define sets of tags.

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