Excerpts from Nina Jeliazkova's message of Fri Oct 02 17:06:44 +0200 2009:
> Dear All,
> 
> We could consider Life Sciences Identifiers  approach 
> http://lsids.sourceforge.net/

Looks like a good option. I was already tempted to use the info URI
scheme
(http://info-uri.info/registry/OAIHandler?verb=GetRecord&metadataPrefix=reg&identifier=info:inchi/)
as chemical identifier, but I have settled for pure InChIs instead of adding "info:inchi/".

Best regards,
Christoph