The following is a feature request I initially sent to the SRFI editor. He asked me to submit this request on the mailing list for public discussion.
I've been thinking along these lines, too. This would make a lot of things easier for me and for authors, including automation.For example, I saw [a #scheme] IRC transcript in which someone was looking for a binding search feature. With semantic markup, extracting an index from the SRFis would be easier. Of course, we'd have to convert all 155 older SRFIs, too.