XML by Example

Figure 10.3: The result in a browser

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Structured and Extensible

Figure 10.4: Application architecture

Lessons Learned

Most XML applications are similar to the phone list: There is one DTD that

fully specifies the document. There are one or more style sheets and poten-

tially other applications to process the document. The document is not

extended.

However, if the document is shared by different organizations, it may be

easier to adopt a more extensible approach, as illustrated by the price list

application.

Theoretically, it would have been possible to devise a common DTD to

accommodate the needs of all the merchants. In practice, however, this is a