![]() ![]() The table collections made accessible via TAP are typically stored in relational database management systems (RDBMS). Support for VOTable output is mandatory all other formats are optional. The result of a TAP query is another table, returned as a VOTable or in some other format. Support for the Astronomical Data Query Language (ADQL) is mandatory support for other query languages such as Parameterised Query Language (PQL) or native SQL is optional. Queries may be submitted using various query languages and may execute synchronously or asynchronously. TAP services accept queries posed against the tableset available via the service and return the query response as another table, in accord with the relational model. The Table Access Protocol (TAP) is a Web-service protocol that gives access to collections of tabular data referred to collectively as a tableset. Ģ Requirements for a TAP service (normative) 10Ģ.3.12 Order and cardinality of parameters 16Ģ.8.3 Appearance in requests and in service metadata 24ħ.1.2 Reserved characters in HTTP GET URLs 33 It is appropriate to reference this document only as a recommended standard that is under review and which may be changed before it is accepted as a full recommendation.Ī list of current IVOA Recommendations and other technical documents can be found at. This is an IVOA Proposed Recommendation made available for public review. More sophisticated distributed cross-matching capabilities are possible by orchestrating a distributed query across multiple TAP services. A multi-position query capability permits queries against an arbitrarily large list of astronomical targets, providing a simple spatial cross-matching capability. Special support is provided for spatially indexed queries using the spatial extensions in ADQL. ![]() It also includes support for both synchronous and asynchronous queries. This version of the protocol includes support for multiple query languages, including queries specified using the Astronomical Data Query Language (ADQL) and the Parameterised Query Language (PQL) within an integrated interface. ![]() Access is provided for both database and table metadata as well as for actual table data. The table access protocol (TAP) defines a service protocol for accessing general table data, including astronomical catalogs as well as general database tables. ![]()
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