Peter blogged some days ago about microformats and how they could be used in chemistry. Being late and a bit absent minded, I added a short comment that Chemical blogspace supports microformats for chemistry , and that chemistry is harvested from that, and actually semantically distributed again using CMLRSS.
Egon Willighagen (Fri,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: