In this document, we discuss practices related to the use of RDF-based
consensus vocabularies in the Virtual Observatory, that is the creation,
publication, maintenance, and consumption of hierarchical word lists
agreed upon within the IVOA. To cover the wide range of use cases
envisoned, we define different vocabulary types for informal knowledge
organisation on the one hand, and strict hierarchies of classes and
properties on the other. While the framework rests on the solid
foundations of W3C RDF, provisions are made to facilitate using IVOA
vocabularies without specific RDF tooling. Non-normative appendices
detail the current vocabulary-related tooling.
The Unified Astronomy Thesaurus (UAT) provides a comprehensive,
interlinked set of concepts relevant for astronomy and astrophysics using
SKOS. It is taken up in the Virtual Observatory at least for registry
subject keywords. For various reasons, it is desirable to have the UAT
available subject to the constraints laid down in the IVOA Vocabularies
in the VO 2 specification. This Note describes the rationale and the
details of the UAT adoption by the IVOA.
Shomydl shows Datalink_ documents in a web browser using the
`XSLT used in DaCHS`_. It is meant to give authors of such documents
an idea of how clients would interpret their document.
.. _Datalink: http://ivoa.net/documents/DataLink/
.. _XSLT used in DaCHS: https://github.com/msdemlei/datalink-xslt
This service lets VO data publishers assign Digital Object Identifiers
to their services, greatly enhancing their citability. Since
technically, the DOI references the registry record, this service can
only be used on properly registered services.
Query service for observation metadata for all CADC archival data holdings. This service
provides Table Access Protocol (TAP) API access to observation metadata conforming to the
Common Archive Observation Model (CAOM) and the IVOA ObsCore data model.
The current dynamic collections (new data arriving) include: CFHT, CFHTMEGAPIPE, DAO, DRAO, GEMINI, HST,
JCMT, NEOSSAT, OMM, TESS, VLASS.
The current static collections include: APASS, BLAST, CFHTTERAPIX, CFHTWIRWOLF,
CGPS, DAOPLATES, FUSE, HSTHLA, IRIS, MACHO, MOST, NGVS, UKIRT, VGPS.
The curent external collections (metadata only, data served by original data centre) include:
CHANDRA, NOAO, SDSS, SUBARU, XMM.
This is IRSA's implementation of version 2 of the IVOA Simple Image Access (SIA) protocol. Our SIA v2 service allows a rich variety of searches against IRSA's varied holdings.