TimeOrdinalEraPropertyType Ordinal temporal reference systems .1 Overview

Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. 169 element name=dataSource type=gml:StringOrRefType element name=dataSourceReference type=gml:ReferenceType The remote link attributes of the gml:dataSource element have been deprecated along with its current type. To refer to a remote data source, use the remote link attributes of gml:dataSourceReference instead. EXAMPLE A human observer or an in situ sensor.

14.5.3 Dynamic properties

A convenience group gml:dynamicProperties is defined as follows: group name=dynamicProperties sequence element ref=gml:validTime minOccurs=0 element ref=gml:history minOccurs=0 element ref=gml:dataSource minOccurs=0 element ref=gml:dataSourceReference minOccurs=0 sequence group This allows an application schema developer to include dynamic properties in a content model in a standard fashion. The gml:validTime property is specified in 14.2.1.3. The other properties are specified elsewhere in 14.5.

14.5.4 DynamicFeature

States are captured by time-stamped instances of a feature. gml:DynamicFeature implements DynamicFeature as shown in D.3.11 and is declared as follows: element name=DynamicFeature type=gml:DynamicFeatureType substitutionGroup=gml:AbstractFeature The content model extends the standard gml:AbstractFeatureType with the gml:dynamicProperties model group: complexType name=DynamicFeatureType complexContent extension base=gml:AbstractFeatureType group ref=gml:dynamicProperties extension complexContent complexType Each time- stamped instance represents a ‗snapshot‘ of a feature. The dynamic feature classes will normally be extended to suit particular applications. A dynamic feature bears either a time stamp or a history. NOTE A history consists of a set of gml:AbstractTimeSlices and such time slices may contain any time varying properties. We might for example use such a mechanism to describe a feature with one property that varies in time.

14.5.5 DynamicFeatureCollection

gml:DynamicFeatureCollection implements DynamicFeatureCollection as shown in D.3.11 and is declared as follows: element name=DynamicFeatureCollection type=gml:DynamicFeatureCollectionType substitutionGroup=gml:DynamicFeature