[This is a summary of an idea discussed on the Taxacom mailing list; it has also been posted on the microformats wiki: http://microformats.org/wiki/rel-tag-feedback#UIDs]
Many links on the TDWG's LSID resolver, for instance those on:
http://lsid.tdwg.org/summary/urn:lsid:ubio.org:namebank:11815
are marked up thus
<a href="/summary/urn:lsid:ubio.org:classificationbank:1909656"> urn:lsid:ubio.org:classificationbank:1909656 </a>
If TDWG would simply add rel="tag" to all such links, thus:
<a rel="tag" href="...
then all their pages would be "tagged" with the relevant LSIDs (i.e. everything to the right of the final slash), using the "rel-tag" microformat:
http://microformats.org/wiki/rel-tag
and then people could use those tags to find the equivalent tag on pages about (in blogs, for example) or pictures of (on, say Flickr) the organism concerned, thereby adding discoverability, without reducing or changing any of the current uses of LSIDs.