David Mertz, IBM developerWorks

Over time, XML has permeated many niches. One area where XML is used increasingly is in the configuration of graphical user interfaces, especially in elements that are persistent but should not be fixed at compile-time. In this installment, the author looks at the use of XML in Mac OS X's Aqua GUI, and in the K Desktop Environment (KDE) which is either standard or available in most modern Linux distributions. So far, the use of XML in configuring modern GUIs is a bit haphazard. Most interfaces use XML in some places, but other mechanisms elsewhere. But it's clear that the general movement is toward XML. Clearly, Mac OS X Aqua and KDE each have their own XML philosophy. Mac OS X uses solely XML elements that correspond to broad data types, while everything that is really application-specific or GUI-specific is shunted off into the PCDATA content of container elements. In contrast, KDE's XML feels very usage-specific.

http://www-106.ibm.com/developerworks/xml/library/x-matters34.html

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