<?xml version='1.0'?><?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?><ri:Resource created="2009-12-01T10:00:00Z" status="active" updated="2026-02-02T15:49:15Z" version="1.2" xmlns:g-colstat="http://dc.g-vo.org/ColStats-1" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://dc.g-vo.org/ColStats-1 http://vo.ari.uni-heidelberg.de/docs/schemata/Colstats.xsd http://www.ivoa.net/xml/RegistryInterface/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/RegistryInterface.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogResource"><shortName>tap_schema.keys</shortName><identifier>ivo://org.gavo.dc/__system__/tap/keys</identifier><curation><publisher>The GAVO DC team</publisher><creator><name>GAVO Data Centre</name><logo>http://vo.ari.uni-heidelberg.de/docs/GavoTiny.png</logo></creator><date role="Updated">2024-08-08T11:41:27Z</date><contact><name>GAVO Data Centre Team</name><address>Mönchhofstrasse 12-14, D-69120 Heidelberg</address><email>gavo@ari.uni-heidelberg.de</email><telephone>+49 6221 54 1837</telephone></contact></curation><content><subject>virtual-observatories</subject><subject>catalogs</subject><description>Foreign key relationships between tables available for ADQL querying.</description><referenceURL>http://dc.g-vo.org/tableinfo/tap_schema.keys</referenceURL></content><tableset><schema><name>tap_schema</name><description> GAVO Data Center's Table Access Protocol (TAP) service with
table metadata.</description><table><name>tap_schema.keys</name><description>Foreign key relationships between tables available for ADQL querying.</description><column><name>key_id</name><description>Unique key identifier</description><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>indexed</flag><flag>primary</flag></column><column><name>from_table</name><description>Fully qualified table name</description><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>target_table</name><description>Fully qualified table name</description><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>description</name><description>Description of this key</description><dataType arraysize="*" xsi:type="vs:VOTableType">unicodeChar</dataType><flag>nullable</flag></column><column><name>utype</name><description>Utype of this key</description><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>sourcerd</name><description>Id of the originating rd (local information)</description><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><foreignKey><targetTable>tap_schema.tables</targetTable><fkColumn><fromColumn>from_table</fromColumn><targetColumn>table_name</targetColumn></fkColumn></foreignKey><foreignKey><targetTable>tap_schema.tables</targetTable><fkColumn><fromColumn>target_table</fromColumn><targetColumn>table_name</targetColumn></fkColumn></foreignKey></table></schema></tableset></ri:Resource>