Managing XML data, XML catalogs

Indirect stylesheets, DTDs, and schemas

From the developerWorks archives

Elliotte Harold

Date archived: December 6, 2016 | First published: May 13, 2005

An old programmer's adage states that any problem can be solved with an additional layer of indirection -- an adage that is as true in XML as in any other field. Many problems that arise when loading schemas, DTDs, and stylesheets can be elegantly solved by introducing XML catalogs as an indirection between the parser and the network loader. An XML catalog allows the document consumer to substitute one set of URLs for the actual URLs or public identifiers specified in the XML documents themselves. Doing so improves both the speed and the security of XML processing.

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