The Citrix INI File Reference (CTX107919) is an important document that describes (mostly) ICA file parameters. This article was last updated in 2007 and for the ICA Client version 9.0! Today we are at version 12.x and a lot of new parameter exist but were not published.

This has changed with the new online ICA settings reference documentation based on version 12.x You find the reference under the following url
http://support.citrix.com/proddocs/index.jsp?topic=/ica-settings/ica-settings-wrapper.html