Hi Anthony,

Great question. ConceptURI was added for exactly the purpose you describe. However, it never made it's way as a fully useful feature, as most customers were more interested in 'annotation' in principle than in practice.

We don't have any hard plans to move this area forward, however, there are two (now three) projects that have recently expressed interest. I'd be very interested in knowing more about your requirements

* Which ontologies you are interested in supporting (SNOMED, custom, etc)?
* Do you want to annotate columns types (sounds like yes) or choose subsets of ontology values as legal column values (say medicine codes)?
* What about UMLS?

Matt