Tagging genomic info tables with coordinate system

Upon data import, we need to tag genomic annotation tables with a coordinate system. Since all genomic annotations (with coordinates) in a given table are related to a specific genome coordinate system (genome build), we should tag an entire table with the value (and then this value should be available via query). The values probably should be controlled in some way.

Should this be a special interface change to the concept mapper?
Should genome build identifiers live in a CV and/or special helper-table that can be referenced by all other sources? This might allow us to make "synonyms" for genome builds, such as dm3 (ucsc) = r5.* (flybase).
Are concepts that are mapped to a table available via services?
Some genomic resources have a genome (coordinate) build id as well as an annotation build id. Should we keep track of both of these? For wormbase it is an all-in-one id (WS220 indicates both a genome and annotation build), but for flybase it is a mix (r5.28 indicates genome build 5 annotation build 28). The UCSC identifiers map to a specific genome and annotation build at external resources, defined here: http://genome.ucsc.edu/FAQ/FAQreleases.html (should this be a DISCO resource?).