Document Icons Schema
Applies to: SharePoint Foundation 2010
The Document Icons Schema is used in the DocIcon.xml file to map file name extensions and ProgIDs to associated icons and display text, and to specify controls for activating each file type. DocIcon.xml is located in %ProgramFiles%\Common Files\Microsoft Shared\web server extensions\14\TEMPLATE\XML.
For a programming task that describes how to customize this file, see How to: Add a Document Template, File Type, and Editing Application to a Site Definition.