Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved.
47
gml:TimePeriod xmlns:gml
= http:www.opengis.netgml
gml:beginPosition 2005-10-25T14:45:00.000Z
gml:beginPosition gml:endPosition
2005-11-01T01:25:00.000Z gml:endPosition
gml:TimePeriod
10.5 DescribeFeatureType optional
10.5.1 Introduction
DescribeFeatureType returns the XML schema for the specified GML feature advertised in GetCapabilities. This may be used to obtain a description of the type of an observation
feature-of-interest.
10.5.2 Request
Figure 10-5 Parameters for DescribeFeatureType Request
Table 11. Parameters of DescribeFeatureType Request
Name a
Definition Data type and values
Multiplicity and use
service Service type identifier
SOS One mandatory
version Specification version for operation
Supported version of SOS One mandatory
FeatureId The xlink:href of the feature of interest from
the capabilities document. anyURI One
mandatory a
The name capitalization rules being used here are specified in Subclause 11.6.2 of [OGC 06-121r3].
10.5.3 Response
The response to a DescribeFeatureType request is the XML Schema that defines the feature type for the specified feature.
10.5.4 Exceptions
When a SOS server encounters an error while performing a DescribeFeatureType operation, it shall return an exception report message as specified in clause 8 of [OGC
06-121r3].
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Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved.
10.5.5 Examples
10.5.5.1 Example1
Here is an example of a DescribeFeatureType request for the schema of the feature called station 1 used in the previous examples.
?xml version=1.0 encoding=UTF-8? DescribeFeatureType
xmlns =
http:www.opengis.netsos1.0 xmlns:xsi
= http:www.w3.org2001XMLSchema-instance
xsi:schemaLocation =
http:www.opengis.netsos1.0 http:schemas.opengis.netsos1.0.0sosAll.xsd service
= SOS
version =
1.0.0 FeatureId
urn:MyOrg:feature:station1 FeatureId
DescribeFeatureType
The response would be the schema for Station which might look like this:
?xml version=1.0 encoding=UTF-8? schema
xmlns:gml =
http:www.opengis.netgml xmlns:gmd
= http:www.isotc211.org2005gmd
xmlns:swe =
http:www.opengis.netswe1.0.1 xmlns:om
= http:www.opengis.netom1.0
xmlns =
http:www.w3.org2001XMLSchema xmlns:sa
= http:www.opengis.netsampling1.0
targetNamespace =
http:www.opengis.netsampling1.0.0 elementFormDefault
= qualified
attributeFormDefault =
unqualified version
= 1.0.0
. . . complexType
name =
StationType annotation
documentation A Station is an identified position 0-D geospatial feature.
It may be revisited for various purposes, in particular to retrieve multiple specimens or make repeated or complementary observations.
The position property of the station provides the value of the position property of observations an specimens associated with the station.
By using the Station feature, this position information and any metadata associated with it may be encoded in one place, i.e. normalised, and then re-used _by reference_ on other feature instances associated with
it. documentation
annotation complexContent
extension base
= sa:SamplingFeatureType
sequence element
name =
position type
= gml:PointPropertyType
element name
= elevation
type =
gml:DirectPositionType minOccurs
= annotation
documentation Use the srsName attribute to record the elevation
datum documentation
annotation element
sequence extension
complexContent complexType
-- ..................
-- element
name =
Station type
= sa:StationType
substitutionGroup =
sa:SamplingFeature . . .
schema
Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved.
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10.6 DescribeObservationType optional
