Subset of referenceSystems.xsd for WCS 1.2 profile. Primary editor: Arliss Whiteside. Copyright (c) 2007,2010 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . Basic encoding for reference system objects, simplifying and restricting the DefinitionType as needed. The name by which this reference system is identified. Description of a spatial and/or temporal reference system used by a dataset. Set of alterative identifications of this reference system. The first srsID, if any, is normally the primary identification code, and any others are aliases. Comments on or information about this reference system, including source information. An identification of a reference system. Association to a reference system, either referencing or containing the definition of that reference system. Abstract coordinate reference system, usually defined by a coordinate system and a datum. This abstract complexType shall not be used, extended, or restricted, in an Application Schema, to define a concrete subtype with a meaning equivalent to a concrete subtype specified in this document. Association to a CRS abstract coordinate reference system, either referencing or containing the definition of that CRS. An identification of a CRS object. The first use of the IdentifierType for an object, if any, is normally the primary identification code, and any others are aliases. The code or name for this Identifier, often from a controlled list or pattern defined by a code space. The optional codeSpace attribute is normally included to identify or reference a code space within which one or more codes are defined. This code space is often defined by some authority organization, where one organization may define multiple code spaces. The range and format of each Code Space identifier is defined by that code space authority. Information about that code space authority can be included as metaDataProperty elements which are optionally allowed in all CRS objects. Remarks about this code or alias. Identifier of the version of the associated codeSpace or code, as specified by the codeSpace or code authority. This version is included only when the "code" or "codeSpace" uses versions. When appropriate, the version is identified by the effective date, coded using ISO 8601 date format. Information about this object or code. Restricted to only allow a text string, as done in GML 3.2. Description of domain of usage, or limitations of usage, for which this CRS object is valid. Area or region in which this CRS object is valid. Information about the spatial, vertical, and/or temporal extent of a reference system object. Constraints: At least one of the elements "description", "boundingBox", "boundingPolygon", "verticalExtent", and temporalExtent" must be included, but more that one can be included when appropriate. Furthermore, more than one "boundingBox", "boundingPolygon", "verticalExtent", and/or temporalExtent" element can be included, with more than one meaning the union of the individual domains. Description of spatial and/or temporal extent of this object. Geographic domain of this reference system object. Unordered list of bounding boxes (or envelopes) whose union describes the spatial domain of this object. Unordered list of bounding polygons whose union describes the spatial domain of this object. Unordered list of vertical intervals whose union describes the spatial domain of this object. A bounding box (or envelope) defining the spatial domain of this object. A bounding polygon defining the horizontal spatial domain of this object. An interval defining the vertical spatial domain of this object.