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Annotations
Attributes
Diagrams
Facets
Properties
Source
Used by
Complex Type gml:TimePositionType
Namespace http://www.opengis.net/gml/3.2
Annotations
The method for identifying a temporal position is specific to each temporal reference system.  gml:TimePositionType supports the description of temporal position according to the subtypes described in ISO 19108.
Values based on calendars and clocks use lexical formats that are based on ISO 8601, as described in XML Schema Part 2:2001. A decimal value may be used with coordinate systems such as GPS time or UNIX time. A URI may be used to provide a reference to some era in an ordinal reference system . 
In common with many of the components modelled as data types in the ISO 19100 series of International Standards, the corresponding GML component has simple content. However, the content model gml:TimePositionType is defined in several steps.
Three XML attributes appear on gml:TimePositionType:
A time value shall be associated with a temporal reference system through the frame attribute that provides a URI reference that identifies a description of the reference system. Following ISO 19108, the Gregorian calendar with UTC is the default reference system, but others may also be used. Components for describing temporal reference systems are described in 14.4, but it is not required that the reference system be described in this, as the reference may refer to anything that may be indentified with a URI.  
For time values using a calendar containing more than one era, the (optional) calendarEraName attribute provides the name of the calendar era.  
Inexact temporal positions may be expressed using the optional indeterminatePosition attribute.  This takes a value from an enumeration.
Diagram
Diagram index79.tmp#id411 index80.tmp#id413 index80.tmp#id414 index80.tmp#id415
Type extension of gml:TimePositionUnion
Type hierarchy
Properties
final: extension, restriction
Used by
Attributes
QName Type Fixed Default Use Annotation
calendarEraName string optional
frame anyURI #ISO-8601 optional
indeterminatePosition gml:TimeIndeterminateValueType optional
Source
<complexType name="TimePositionType" final="#all">
  <annotation>
    <documentation>The method for identifying a temporal position is specific to each temporal reference system. gml:TimePositionType supports the description of temporal position according to the subtypes described in ISO 19108. Values based on calendars and clocks use lexical formats that are based on ISO 8601, as described in XML Schema Part 2:2001. A decimal value may be used with coordinate systems such as GPS time or UNIX time. A URI may be used to provide a reference to some era in an ordinal reference system . In common with many of the components modelled as data types in the ISO 19100 series of International Standards, the corresponding GML component has simple content. However, the content model gml:TimePositionType is defined in several steps. Three XML attributes appear on gml:TimePositionType: A time value shall be associated with a temporal reference system through the frame attribute that provides a URI reference that identifies a description of the reference system. Following ISO 19108, the Gregorian calendar with UTC is the default reference system, but others may also be used. Components for describing temporal reference systems are described in 14.4, but it is not required that the reference system be described in this, as the reference may refer to anything that may be indentified with a URI. For time values using a calendar containing more than one era, the (optional) calendarEraName attribute provides the name of the calendar era. Inexact temporal positions may be expressed using the optional indeterminatePosition attribute. This takes a value from an enumeration.</documentation>
  </annotation>
  <simpleContent>
    <extension base="gml:TimePositionUnion">
      <attribute name="frame" type="anyURI" default="#ISO-8601"/>
      <attribute name="calendarEraName" type="string"/>
      <attribute name="indeterminatePosition" type="gml:TimeIndeterminateValueType"/>
    </extension>
  </simpleContent>
</complexType>
Schema location http://schemas.opengis.net/gml/3.2.1/temporal.xsd
Attribute gml:TimePositionType / @frame
Namespace No namespace
Type anyURI
Properties
default: #ISO-8601
Used by
Complex Type gml:TimePositionType
Source
<attribute name="frame" type="anyURI" default="#ISO-8601"/>
Schema location http://schemas.opengis.net/gml/3.2.1/temporal.xsd
Attribute gml:TimePositionType / @calendarEraName
Namespace No namespace
Type string
Properties
content: simple
Used by
Complex Type gml:TimePositionType
Source
<attribute name="calendarEraName" type="string"/>
Schema location http://schemas.opengis.net/gml/3.2.1/temporal.xsd
Attribute gml:TimePositionType / @indeterminatePosition
Namespace No namespace
Type gml:TimeIndeterminateValueType
Properties
content: simple
Facets
enumeration after
enumeration before
enumeration now
enumeration unknown
Used by
Complex Type gml:TimePositionType
Source
<attribute name="indeterminatePosition" type="gml:TimeIndeterminateValueType"/>
Schema location http://schemas.opengis.net/gml/3.2.1/temporal.xsd