2026-05-27T05:04:36.121263ivo://astro.ucl.ac.uk/__system__/tap/key_columnsastro.ucl.ac.ukPatrick Guiohttps://www.ucl.ac.uk/visual-identity/logos/standalone.png2017-03-08T14:59:34Patrick GuioGower Street, London, WC1E 6BT, United Kingdomp.guio@ucl.ac.uk+44 20 7679 0672Virtual observatoryCatalogsADQLColumns participating in foreign key relationships between tables
available for ADQL querying.http://astroweb.projects.phys.ucl.ac.uk:8000/tableinfo/tap_schema.key_columnstap_schema UCL DaCHS server's Table Access Protocol (TAP) service with
table metadata.tap_schema.key_columnsColumns participating in foreign key relationships between tables
available for ADQL querying.key_idKey identifier from TAP_SCHEMA.keyscharnullablefrom_columnKey column name in the from tablecharnullabletarget_columnKey column in the target tablecharnullablesourcerdId of the originating rd (local information)charnullable