---++ Astronomical Data Query Language The Astronomical Data Query Language (ADQL) is the language used by the IVOA to represent astronomy queries posted to VO services. ADQL is based on the Structured Query Language, especially SQL 92; special restrictions and extensions have been defined in order to support generic and astronomy specific operations. ---+++ Current recommendation The current IVOA Recommendation is [[http://www.ivoa.net/documents/ADQL/2.0][ADQL-2.0]] (30 October 2008). [[ADQL-2_0-Next][ADQL-2.0-Next]] page collects errata, proposed features and notes while developing the next revision of the specification. ---+++ ADQL-2.1 Working draft ---+++++ Compiled PDF * DAL Internal WD (2015-06-01): [[%ATTACHURL%/WD-ADQL-2.1-20150601.pdf][WD-ADQL-2.1-20150601]] (svn revision 2983) ---+++++Document source The ADQL specification is based on the ivoatex environment. The source code for the document can be found online in the [[https://code.google.com/p/volute/][volute]] repository. * [[https://code.google.com/p/volute/source/browse/#svn%2Ftrunk%2Fprojects%2Fdal%2FADQL][ADQL document]] Use the following commmand to checkout a local copy of the document source. <verbatim> svn checkout https://volute.googlecode.com/svn/trunk/projects/dal/ADQL </verbatim> ---++++ Previous versions * [[http://www.ivoa.net/Documents/WD/ADQL/ADQL-20050602.pdf][]] <!-- * Set ALLOWTOPICRENAME = IVOA.TWikiAdminGroup -->
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