September 2003
Intermediate to advanced
336 pages
7h 20m
English
Content preview from Effective XML: 50 Specific Ways to Improve Your XML
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Item 18. Include All Information in the Instance Document
An XML document is not the same thing as an XML file. XML provides a bewildering array of options for building documents and infosets out of multiple pieces. Among them are the following:
External parsed entity references
Internal parsed entity references
XInclude
Default attribute values from the DTD
Default attribute values from the schema
These can be useful shortcuts for authoring, but they are death traps for interoperable documents. Many XML processors do not read the external DTD subset and cannot resolve any entity references defined therein. They also cannot apply default attribute values. Few current XML parsers can read a schema and apply default attribute values found there. Almost ...
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