- ID:
- ivo://ivoa.net/std/SimpleDALRegExt
- Title:
- Describing Simple Data Access Services
- Short Name:
- SimpleDALRegExt
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- An application that queries or consumes descriptions of VO resources must be able to recognize a resource's support for standard IVOA protocols. This specification describes how to describe a service that supports any of the four fundamental data access protocols--Simple Cone Search (SCS), Simple Image Access (SIA), Simple Spectral Access (SSA), Simple Line Access (SLA)--using the VOResource XML encoding standard. A key part of this specification is the set of VOResource XML extension schemas that define new metadata that are specific to those protocols. This document describes in particular rules for describing such services within the context of IVOA Registries and data discovery as well as the VO Standard Interface (VOSI) and service self-description. In particular, this document spells out the essential mark-up needed to identify support for a standard protocol and the base URL required to access the interface that supports that protocol.
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- ID:
- ivo://ivoa.net/IVOA
- Title:
- International Virtual Observatory Alliance
- Short Name:
- IVOA
- Date:
- 01 Jan 2000 09:00:00
- Publisher:
- International Virtual Observatory Alliance
- Description:
- The International Virtual Observatory Alliance (IVOA) was formed in June 2002 with a mission to facilitate the international coordination and collaboration necessary for the development and deployment of the tools, systems and organizational structures necessary to enable the international utilization of astronomical archives as an integrated and interoperating virtual observatory. By January 2005, the IVOA has grown to include 15 funded VO projects from Australia, Canada, China, Europe, France, Germany, Hungary, India, Italy, Japan, Korea, Russia, Spain, the United Kingdom, and the United States. This membership is now being expanded to include representation from projects constructing and planning new observatories and astronomical facilities, as well as emerging astronomical communities that seek to benefit from the global availability of VO facilities and technologies.
- ID:
- ivo://ivoa.net
- Title:
- IVOA Naming Authority
- Short Name:
- IVOA
- Date:
- 01 Jul 2006 09:00:00
- Publisher:
- International Virtual Observatory Alliance
- Description:
- This registers the IVOA as the oowner of the ivoa.net authority identifier.
- ID:
- ivo://ivoa.net/rofr
- Title:
- IVOA Registry of Registries
- Short Name:
- RofR
- Date:
- 05 Feb 2015 20:28:40
- Publisher:
- International Virtual Observatory Alliance
- Description:
- This is a special publishing registry that describes resources that represent important infrastructure components to the VO registry framework. A primary purpose is to provide a registry to discover other publishing registries. A registry that wants to harvest all records known to the VO can first harvest from this registry a list of all known publishing registries (via the IVOA Registry Interface for harvesting with set=ivoa_publishers). An interactive interface allows publishing registry providers to check their interfaces and make their registries known to the framework. This registry also describes standard protocols recognized by the IVOA.
- ID:
- ivo://ivoa.net/std/SpectrumDM
- Title:
- IVOA Spectrum Data Model
- Short Name:
- SpectrumDM
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- We present a data model describing the structure of spectrophotometric datasets with spectral and temporal coordinates and associated metadata. This data model may be used to represent spectra, time series data, segments of SED (Spectral Energy Distributions) and other spectral or temporal associations.
- ID:
- ivo://ivoa.net/std/ConeSearch
- Title:
- Simple Cone Search
- Short Name:
- ConsSearch
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- This specification defines a simple query protocol for retrieving records from a catalog of astronomical sources. The query describes sky position and an angular distance, defining a cone on the sky. The response returns a list of astronomical sources from the catalog whose positions lie within the cone, formatted as a VOTable. This version of the specification is essentially a transcription of the original Cone Search specification in order to move it into the IVOA standardization process. Note that the metadata used to describe a Cone Search service in the registry is defined in the SimpleDALRegExt standard (ivo://www.ivoa.net/std/SimpleDALRegExt; http://www.ivoa.net/Documents/SimpleDALRegExt/).
- ID:
- ivo://ivoa.net/std/SIA
- Title:
- Simple Image Access Protocol
- Short Name:
- SIA
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- The Simple Image Access (SIA) Protocol is a protocol for retrieving image data from a variety of astronomical image repositories through a uniform interface. The interface is meant to be reasonably simple to implement by service providers. A query defining a rectangular region on the sky is used to query for candidate images. The service returns a list of candidate images formatted as a VOTable. For each candidate image an access reference URL may be used to retrieve the image. Images may be returned in a variety of formats including FITS and various graphics formats. Referenced images are often computed on the fly, e.g., as cutouts from larger images. Note that the metadata used to describe an SIA service in the registry is defined in the SimpleDALRegExt standard (ivo://www.ivoa.net/std/SimpleDALRegExt; http://www.ivoa.net/Documents/SimpleDALRegExt/).
- ID:
- ivo://ivoa.net/std/SLAP
- Title:
- Simple Line Access Protocol
- Short Name:
- SIA
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- The Simple Line Access Protocol (SLAP) is an IVOA Data Access protocol which defines a protocol for retrieving spectral lines coming from various Spectral Line Data Collections through a uniform interface within the VO framework. These lines can be either observed or theoretical and will be typically used to identify emission or absorption features in astronomical spectra. It makes use of the Simple Spectral Line Data Model (SSLDM) to characterize spectral lines through the use of uTypes. Physical quantities of units are described by using the standard Units DM. SLAP services can be registered in an IVOA Registry of Resources using the VOResource Extension standard, having a unique ResourceIdentifier in the Registry. The SLAP interface is meant to be reasonably simple to implement by service providers. A basic query will be done in a wavelength range for the different services. The service returns a list of spectral lines formatted as a VOTable. Thus, an implementation of the service may support additional search parameters (some which may be custom to that particular service) to more finely control the selection of spectral lines. The specification also describes how the search on extra parameters has to be done, making use of the support provided by the Simple Spectral Line Data Model. Note that the metadata used to describe an SLAP service in the registry is defined in the SimpleDALRegExt standard (ivo://www.ivoa.net/std/SimpleDALRegExt; http://www.ivoa.net/Documents/SimpleDALRegExt/).
- ID:
- ivo://ivoa.net/std/SSA
- Title:
- Simple Spectral Access Protocol
- Short Name:
- SSA
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- The Simple Spectral Access (SSA) Protocol (SSAP) defines a uniform interface to remotely discover and access one dimensional spectra. SSA is a member of an integrated family of data access interfaces altogether comprising the Data Access Layer (DAL) of the IVOA. SSA is based on a more general data model capable of describing most tabular spectrophotometric data, including time series and spectral energy distributions (SEDs) as well as 1-D spectra; however the scope of the SSA interface as specified in this document is limited to simple 1-D spectra, including simple aggregations of 1-D spectra. The form of the SSA interface is simple: clients first query the global resource registry to find services of interest and then issue a data discovery query to selected services to determine what relevant data is available from each service; the candidate datasets available are described uniformly in a VOTable format document which is returned in response to the query. Finally, the client may retrieve selected datasets for analysis. Spectrum datasets returned by an SSA spectrum service may be either precomputed, archival datasets, or they may be virtual data which is computed on the fly to respond to a client request. Spectrum datasets may conform to a standard data model defined by SSA, or may be native spectra with custom project-defined content. Spectra may be returned in any of a number of standard data formats. Spectral data is generally stored externally to the VO in a format specific to each spectral data collection; currently there is no standard way to represent astronomical spectra, and virtually every project does it differently. Hence spectra may be actively mediated to the standard SSA-defined data model at access time by the service, so that client analysis programs do not have to be familiar with the idiosyncratic details of each data collection to be accessed. Note that the metadata used to describe an SSA service in the registry is defined in the SimpleDALRegExt standard (ivo://www.ivoa.net/std/SimpleDALRegExt; http://www.ivoa.net/Documents/SimpleDALRegExt/).
- ID:
- ivo://ivoa.net/std/STC
- Title:
- Space-Time Coordinate Metadata for the Virtual Observatory
- Short Name:
- STC
- Date:
- 02 Apr 2013 11:19:48
- Publisher:
- International Virtual Observatory Alliance
- Description:
- This document provides a complete design description of the Space-Time Coordinate (STC) metadata for the Virtual Observatory. It explains the various components, highlights some implementation considerations, presents a complete set of UML diagrams, and discusses the relation between STC and certain other parts of the Data Model. Two serializations are discussed: XML Schema (STC-X) and String (STC-S); the former is an integral part of this Recommendation.
