The Dynamic Web Accessibility Adaptable States and Properties module includes a describedby property which provides help text to describe the object. This maps to platform accessibility APIs as well.
Add an XHTML technique that demonstrates using Dynamic Web Content Accessibility "describedby" property.
We have created a technique titled, "Using Accessible Rich Internet Application describedby property to provide a descriptive, programmatically determined label". This is an advisory technique for Success Criteria 1.3.1, 2.4.4 and 2.4.5. It can be moved to a sufficient technique when Accessible Rich Internet Application specifications reach W3C recommendation status and are well supported.