gmd:extent
Element information
Namespace: http://www.isotc211.org/2005/gmd
Schema document: external/ogc/iso/19139/20070417/gmd/extent.xsd
Other elements with the same name: gmd:extent
Type: gts:TM_Primitive_PropertyType
Properties: Local, Qualified
Content
- Choice [0..1]
- gml:TimeInstantgml:TimeInstant acts as a zero-dimensional geometric primitive that represents an identifiable position in time.
- gml:TimePeriodgml:TimePeriod acts as a one-dimensional geometric primitive that represents an identifiable extent in time. The location in of a gml:TimePeriod is described by the temporal positions of the instants at which it begins and ends. The length of the period is equal to the temporal distance between the two bounding temporal positions. Both beginning and end may be described in terms of their direct position using gml:TimePositionType which is an XML Schema simple content type, or by reference to an indentifiable time instant using gml:TimeInstantPropertyType. Alternatively a limit of a gml:TimePeriod may use the conventional GML property model to make a reference to a time instant described elsewhere, or a limit may be indicated as a direct position.
- gml:TimeNodeA time node is a zero-dimensional topological primitive that represents an identifiable node in time (it is equivalent to a point in space). A node may act as the termination or initiation of any number of time edges. A time node may be realised as a geometry, its position, whose value is a time instant.
- gml:TimeEdgeA time edge is a one-dimensional topological primitive. It is an open interval that starts and ends at a node. The edge may be realised as a geometry whose value is a time period.
from subst. group gml:AbstractTimeGeometricPrimitivefrom subst. group gml:AbstractTimeTopologyPrimitive
Attributes
| Name | Occ | Type | Description | Notes |
|---|---|---|---|---|
| xlink:type | [0..1] | xsd:string | Fixed value is "simple". from group xlink:simpleLink | |
| xlink:href | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:role | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:arcrole | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:title | [0..1] | xsd:string | from group xlink:simpleLink | |
| xlink:show | [0..1] | Anonymous | The 'show' attribute is used to communicate the desired presentation of the ending resource on traversal from the starting resource; it's value should be treated as follows: new - load ending resource in a new window, frame, pane, or other presentation context replace - load the resource in the same window, frame, pane, or other presentation context embed - load ending resource in place of the presentation of the starting resource other - behavior is unconstrained; examine other markup in the link for hints none - behavior is unconstrained | from group xlink:simpleLink |
| xlink:actuate | [0..1] | Anonymous | The 'actuate' attribute is used to communicate the desired timing of traversal from the starting resource to the ending resource; it's value should be treated as follows: onLoad - traverse to the ending resource immediately on loading the starting resource onRequest - traverse from the starting resource to the ending resource only on a post-loading event triggered for this purpose other - behavior is unconstrained; examine other markup in link for hints none - behavior is unconstrained | from group xlink:simpleLink |
| uuidref | [0..1] | xsd:string | from group gco:ObjectReference | |
| gco:nilReason | [0..1] | gml:NilReasonType |
Used in
- Type gmd:EX_SpatialTemporalExtent_Type via extension of gmd:EX_TemporalExtent_Type (Element gmd:EX_SpatialTemporalExtent)
- Type gmd:EX_TemporalExtent_Type (Element gmd:EX_TemporalExtent)
Sample instance
<gmd:extent> <gml:TimeInstant gml:id="ID"> <gml:metaDataProperty> <gml:GenericMetaData>Any text, intermingled with: <!--any element--> </gml:GenericMetaData> </gml:metaDataProperty> <gml:description>string</gml:description> <gml:descriptionReference/> <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier> <gml:name>string</gml:name> <gml:relatedTime> <gml:TimeInstant gml:id="ID">... </gml:TimeInstant> </gml:relatedTime> <gml:timePosition>12:00:00</gml:timePosition> </gml:TimeInstant> </gmd:extent>