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XML Topic Maps: Creating and Using Topic Maps for the Web by Jack Park, Sam Hunting

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Design Principles for XTM

Simplicity

Figure 2-1 sketches the developmental history of XTM. The roots lie in SGML. (Chapter 3 discusses the history of SGML in more detail.) XML was created because many users felt that SGML was too complicated. There was a need to simplify and limit its features to those that are essential for use in a Web context. XTM was designed with the same motivation: to simplify the ISO topic map specification for optimized use on the Web. (However, the development of XML shows that the eliminated complexity is returning in the associated specifications.)

Figure 2-1. The history of XTM

Topic maps are intrinsically simple: ...

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