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Annotations
Attributes
Diagrams
Instances
Properties
Source
Element gml:Observation
Namespace http://www.opengis.net/gml/3.2
Annotations
The content model is a straightforward extension of gml:AbstractFeatureType; it automatically has the gml:identifier, gml:description, gml:descriptionReference, gml:name, and gml:boundedBy properties. 
The gml:validTime element describes the time of the observation. Note that this may be a time instant or a time period.
The gml:using property contains or references a description of a sensor, instrument or procedure used for the observation.
The gml:target property contains or references the specimen, region or station which is the object of the observation. This property is particularly useful for remote observations, such as photographs, where a generic location property might apply to the location of the camera or the location of the field of view, and thus may be ambiguous.  
The gml:subject element is provided as a convenient synonym for gml:target. This is the term commonly used in phtotography.  
The gml:resultOf property indicates the result of the observation.  The value may be inline, or a reference to a value elsewhere.
Diagram
Diagram index1.tmp#id75 index2.tmp#id69 index3.tmp#id97 index4.tmp#id99 index5.tmp#id103 index6.tmp#id108 index7.tmp#id68 index8.tmp#id67 index59.tmp#id109 index60.tmp#id133 index61.tmp#id66 index9.tmp#id172 index440.tmp#id2050 index441.tmp#id2052 index442.tmp#id2055 index443.tmp#id2049 index444.tmp#id298
Type gml:ObservationType
Type hierarchy
Properties
content: complex
Model gml:metaDataProperty* , gml:description{0,1} , gml:descriptionReference{0,1} , gml:identifier{0,1} , gml:name* , gml:boundedBy{0,1} , gml:location{0,1} , gml:validTime , gml:using{0,1} , gml:target{0,1} , gml:resultOf
Children gml:boundedBy, gml:description, gml:descriptionReference, gml:identifier, gml:location, gml:metaDataProperty, gml:name, gml:resultOf, gml:target, gml:using, gml:validTime
Instance
<gml:Observation gml:id="">
  <gml:metaDataProperty about="" xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,unbounded}</gml:metaDataProperty>
  <gml:description xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:description>
  <gml:descriptionReference xlink:actuate="" xlink:arcrole="" xlink:href="" nilReason="" owns="false" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{0,1}</gml:descriptionReference>
  <gml:identifier codeSpace="">{0,1}</gml:identifier>
  <gml:name codeSpace="">{0,unbounded}</gml:name>
</gml:Observation>
Attributes
QName Type Fixed Default Use Annotation
gml:id ID required
The attribute gml:id supports provision of a handle for the XML element representing a GML Object. Its use is mandatory for all GML objects. It is of XML type ID, so is constrained to be unique in the XML document within which it occurs.
Source
<element name="Observation" type="gml:ObservationType" substitutionGroup="gml:AbstractFeature">
  <annotation>
    <documentation>The content model is a straightforward extension of gml:AbstractFeatureType; it automatically has the gml:identifier, gml:description, gml:descriptionReference, gml:name, and gml:boundedBy properties. The gml:validTime element describes the time of the observation. Note that this may be a time instant or a time period. The gml:using property contains or references a description of a sensor, instrument or procedure used for the observation. The gml:target property contains or references the specimen, region or station which is the object of the observation. This property is particularly useful for remote observations, such as photographs, where a generic location property might apply to the location of the camera or the location of the field of view, and thus may be ambiguous. The gml:subject element is provided as a convenient synonym for gml:target. This is the term commonly used in phtotography. The gml:resultOf property indicates the result of the observation. The value may be inline, or a reference to a value elsewhere.</documentation>
  </annotation>
</element>
Schema location http://schemas.opengis.net/gml/3.2.1/observation.xsd