It seems the COinS Generator is not working, at least when given a DOI it returns the target not a Content Object in Spans. Is there no alternative tool? I couldn't find one. If that is the case, is it because COinS is pretty useless and no one bothered to create another generator? If COinS are useful, maybe another instance of the generator or a different but similar service would be a good thing.
In principle, I like microformats. Anything that supplies more semantics to information is something I tend to support. COinS seem like a very useful microformat, nothing in RDFa, that I know of, is a decent substitute. What's happening here?