Text Alternatives to Inaccessible Web Pages
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnacc/html/textalter_inaccessible_web_pp.asp

Bridge, Karl
Microsoft
2005

Abstract:

This document details an XML-based method of providing end-user control over the format of an online document, Web page or entire Web site. This functionality is useful in situations where users, due to preference or physical ability, require a way to personalize their view of the content. Content managers, editors, and developers are also able to work with one set of documents, eliminating the need for multiple files that contain the same information with different formatting, therefore reducing redundancy, version inconsistencies, and workload.