The IAPS TAP SERVICES's TAP end point. The Table Access
Protocol (TAP) lets you execute queries against our database tables,
inspect various metadata, and upload your own data. It is thus the
VO's premier way to access public data holdings.
Tables exposed through this endpoint include: epn_core from the nnn schema, columns, groups, key_columns, keys, schemas, tables from the tap_schema schema, epn_core from the ndc schema, epn_core from the ndcs schema, epn_core from the vir schema, epn_core from the vir_datalink schema, epn_core from the cemls schema, emptyobscore, obscore from the ivoa schema.