Does iTunes U support the iTunes Timed Text Profile?

I'm looking for a way to manage captions and subtitles on iTunes U without having to embed them in the video file (and upload all the data all over again).

In the "iTunes Video and Audio Asset Guide 5.2" there is a description of "iTunes Timed Text" (.itt file) in the section on submitting film files (presumably for the Apple Store). Does iTunes U have similar support for this .itt file format?

Thanks in advance, Peter Pinch