This is the XML Schema for simple data components of the OGC SWE Common 2.0.0 parts used by ISO 19123-2 Coverage Implementation Schema (CIS). This XML Schema Document is derived from OGC SWE Common Data Model Encoding Standard 2.0.0 (OGC 08-094r1), it includes modifications for alignment with ISO/TC 211 standards and URI structures. Last updated: 2026-04-01 Copyright (c) 2026 ISO/TC 211. All rights reserved. OGC SWE Common Data Model Encoding Standard 2.0.0 (OGC 08-094r1) is copyright (c) 2011 Open Geospatial Consortium. Used by ISO/TC211 with permission from OGC. To obtain additional rights of use from OGC, visit http://www.opengeospatial.org/legal/. Scalar component with integer representation used for a discrete counting value Value is optional, to enable structure to act as a schema for values provided using other encodings Pair of categorical values used to specify a range in an ordinal reference system (specified by the code space) Name of the dictionary defining an ordered set of values with respect to which the range is expressed (ordinal reference system) Value is a pair of tokens separated by a space (if tokens contain spaces, they must be espaced by using XML entities). It is optional, to enable structure to act as a schema for values provided using other encodings Frame of reference (usually temporal or spatial) with respect to which the value of the component is expressed. A reference frame anchors a value to a real world datum. Specifies the reference axis (refer to gml:axisID). The reference frame URI should also be specified unless it is inherited from parent Vector Decimal pair for specifying a quantity range with a unit of measure Unit of measure used to express the value of this data component Value is a pair of double numbers separated by a space. It is optional, to enable structure to act as a schema for values provided using other encodings Scalar component used to represent a time quantity either as ISO 8601 (e.g. 2004-04-18T12:03:04.6Z) or as a duration relative to a time of reference Temporal unit of measure used to express the value of this data component Value is optional, to enable structure to act as a schema for values provided using other encodings Specifies the origin of the temporal reference frame as an ISO8601 date (used to specify time after an epoch that is to say in a custom frame) Temporal frame of reference whose origin is located by the value of this component Time value pair for specifying a time range (can be a decimal or ISO 8601) Temporal unit of measure used to express the value of this data component Value is a pair of time values expressed in ISO-8601 or as decimal numbers separated by a space. It is optional, to enable structure to act as a schema for values provided using other encodings Specifies the origin of the temporal reference frame as an ISO8601 date (used to specify time after an epoch that is to say in a custom frame) Temporal frame of reference whose origin is located by the value of this component Scalar component used to express truth: True or False, 0 or 1 Value is optional, to enable structure to act as a schema for values provided using other encodings Free text component used to store comments or any other type of textual statement Value is optional, to enable structure to act as a schema for values provided using other encodings Scalar component used to represent a categorical value as a simple token identifying a term in a code space Name of the dictionary where the possible values for this component are listed and defined Value is optional, to enable structure to act as a schema for values provided using other encodings Scalar component with decimal representation and a unit of measure used to store value of a continuous quantity Unit of measure used to express the value of this data component Value is optional, to enable structure to act as a schema for values provided using other encodings Abstract base class for all data components Specifies if the value of a data component can be updated externally (i.e. is variable) Specifies that data for this component can be omitted in the datastream Reference to semantic information defining the precise nature of the component Integer pair used for specifying a count range Value is a pair of integer numbers separated by a space. It is optional, to enable structure to act as a schema for values provided using other encodings Defines permitted values for the component, as an enumerated list of tokens or a regular expression pattern Defines the permitted values for the component as an enumerated list and/or a list of inclusive ranges Defines the permitted values for the component, as a time range or an enumerated list of time values Provides an indication of the reliability of the parent component value in the form of a decimal number (ex: relative accuracy), a range (ex: bidirectional tolerance), a categorical value (ex: good, bad) or plain textual statement Re-usable group providing a choice of range data components Re-usable group providing a choice of numeric data components Re-usable group providing a choice of scalar data components