VODataService xs vs An extension to the core resource metadata (VOResource) for describing data collections and services. A logical grouping of data which, in general, is composed of one or more accessible datasets. A collection can contain any combination of images, spectra, catalogs, or other data. (A dataset is a collection of digitally-encoded data that is normally accessible as a single unit, e.g. a file.) Subject the observatory or facility used to collect the data contained or managed by this resource. Subject Subject.Instrument the Instrument used to collect the data contain or managed by a resource. Rights Information about rights held in and over the resource. This should be repeated for all Rights values that apply. The physical or digital manifestation of the information supported by a resource. MIME types should be used for network-retrievable, digital data. Non-MIME type values are used for media that cannot be retrieved over the network--e.g. CDROM, poster, slides, video cassette, etc. Extent of the content of the resource over space, time, and frequency. Since vs:Coverage is abstract, one must use xsi:type to specify a specific sub-type. Editor's note: STC metadata is expected to be used to describe coverage; however how this should be done is unclear as over this release. Use of xsi:type allows us to illustrate several approaches without modification to this schema. A description of a portion of the collection. The URL that can be used to download the data contained in this data collection. A description of how a resource's contents or behavior maps to the sky, to time, and to frequency space, including coverage and resolution. The STC description of the location of the resource's data (or behavior on data) on the sky, in time, and in frequency space, including resolution. In general, this description should be approximate; a more precise description can be provided by the footprint service. a reference to a footprint service for retrieving precise and up-to-date description of coverage. the ivo-id attribute refers to a Service record that describes the Footprint capability. That is, the record will have a capability element describing the service. The resource refered to may be the current one. a named spectral region of the electro-magnetic spectrum that the resource's spectral coverage overlaps with. the service URL for a potentially registerd service. That is, if an IVOA identifier is also provided, then the service is described in a registry. The URI form of the IVOA identifier for the service describing the capability refered to by this element. wavelength >= 10 mm; frequency <= 30 GHz. 0.1 mm <= wavelength <= 10 mm; 3000 GHz >= frequency >= 30 GHz. 1 micron <= wavelength <= 100 micons 0.3 microns <= wavelength <= 1 micon; 300 nm <= wavelength <= 1000 nm; 3000 Angstroms <= wavelength <= 10000 Angstroms 0.1 microns <= wavelength <= 0.3 micon; 1000 nm <= wavelength <= 3000 nm; 1000 Angstroms <= wavelength <= 30000 Angstroms 100 Angstroms <= wavelength <= 1000 Angstroms; 12 eV <= Energy <= 120 eV 0.1 Angstroms <= wavelength <= 100 Angstroms; 0.12 keV <= energy <= 120 keV energy >= 120 keV A detailed description of a logically-related set of tables. a description of a table and its columns. if true, then the content is a MIME Type A service for accessing astronomical data Subject the observatory or facility used to collect the data contained or managed by this resource. Subject Subject.Instrument the Instrument used to collect the data contain or managed by a resource. Extent of the content of the resource over space, time, and frequency. Note that this definition is a temporary stand-in specification to be used until the STC metadata can be integrated in. Resolution has been folded into coverage as this expected to be the case for the final STC-based version. A service invoked via an HTTP Query (either Get or Post) with a set of arguments consisting of keyword name-value pairs. Note that the URL for help with this service can be put into the Service/ReferenceURL element. The type of HTTP request, either GET or POST. The MIME type of a document returned by an HTTP Get. a description of a input parameter. Each should be rendered as name=value in the query URL's arguements. The type of HTTP request, either GET or POST. A service that interacts with one or more specified tables having some coverage of the sky, time, and/or frequency. A table with sky coverage typically have columns that give longitude-latitude positions in some coordinate system. a description of a table and its columns. A service that returns or otherwise interacts with one or more specified tables. This type differs from a CatalogService in that the table or tables do not have any inherent coverage of the sky. In particular, one cannot include Coverage information. Subject the observatory or facility used to collect the data contained or managed by this resource. Subject Subject.Instrument the Instrument used to collect the data contain or managed by a resource. a description of a table and its columns. the name of the table a description of the tables contents a description of a table column. a name for the role this table plays. Recognized values include "out", indicating this table is output from a query. a description of a parameter that places no restriction on the parameter's data type. As the parameter's data type is usually important, schemas normally employ a sub-class of this type (e.g. Param), rather than this type directly. the name of the column a description of the column's contents the unit associated with all values in the column the name of a unified content descriptor. See .... a description of a table parameter having a fixed data type. The allowed data type names match those supported by VOTable. a type of data contained in the column If true, the meaning and use of this parameter is reserved and defined by a standard model. If false, it represents a database-specific parameter that effectively extends beyond the standard. If not provided, then the value is unknown. a description of a service or function parameter having a fixed data type. The allowed data type names do not imply a size or precise format. This type is intended to be sufficient for describing an input parameter to a simple REST service or a function written in a weakly-typed (e.g., scripting) language. a type of data contained in the column If true, this parameter is required for the application or service to which it applies to work properly. If false, the parameter can be considered optional. If true, the meaning and behavior of this parameter is reserved and defined by a standard interface. If false, it represents an implementation-specific parameter that effectively extends the behavior of the service or application. the parameter is required for the application or service to work properly. the parameter is optional but supported by the application or service. the parameter is not supported and thus is ignored by the application or service. a simple data type that does not imply a size nor precise format. the shape of the array that constitutes the value the default is "1"; i.e. the value is a scalar. a (VOTable-supported) data type the shape of the array that constitutes the value the default is "1"; i.e. the value is a scalar. An expression of a the shape of a multi-dimensional array of the form LxNxM... where each value between gives the integer length of the array along a dimension. An asterisk (*) as the last dimension of the shape indicates that the length of the last axis is variable or undetermined. a scalar data type name taken controlled set that corresponds closely to VOTable data types. All names correspond exactly to VOTable data types except that "string" is added for convenience which is equivalent to "char" with arrayshape="*". a scalar data type name taken from a small controlled set that does not imply a size nor precise format. This set is intended for describing simple input parameters to a service or function a description of standard space-time coordinate systems, positions, and regions. This resource provides a mechanism for registering standard coordinate systems which other resources may reference as part of a coverage descripiton. In particular, coverage descriptions will refer to components of the STC descriptions in this resource via an IVOA identifier. It is intended that an application consuming such coverage descriptions be able to semantically interpret the identifier without resolving it. For this reason, once a standard STC description is registered with this resource type, updating the description is strongly discouraged. An STC description of coordinate systems, positions, and/or regions Each system, position, and region description should have a an XML ID assigned to it. Because the STC schema sets elementFormDefault="qualified", it is recommended that this element specify the STC default namespace via an xmlns namespace.