Documentation for fieldgml

Name	_Geometry
Type	gml:AbstractGeometryType
Nillable	no
Abstract	yes
Documentation	The "_Geometry" element is the abstract head of the substituition group for all geometry elements of GML 3. This includes pre-defined and user-defined geometry elements. Any geometry element must be a direct or indirect extension/restriction of AbstractGeometryType and must be directly or indirectly in the substitution group of "_Geometry".
Application Data	`<sch:pattern name="Check SRS tags"> <sch:rule context="gml:_Geometry"> <sch:extends rule="CRSLabels"/> </sch:rule> </sch:pattern>`

Logical Diagram

XML Instance Representation

<gml:_Geometry
gml:id="[0..1]"
gid="string [0..1]

'This attribute is included for backward compatibility with GML 2 and is deprecated with GML 3. This identifer is superceded by \"gml:id\" inherited from AbstractGMLType. The attribute \"gid\" should not be used anymore and may be deleted in future versions of GML without further notice.'

"
srsName="anyURI [0..1]

'In general this reference points to a CRS instance of gml:CoordinateReferenceSystemType (see coordinateReferenceSystems.xsd). For well known references it is not required that the CRS description exists at the location the URI points to. If no srsName attribute is given, the CRS must be specified as part of the larger context this geometry element is part of, e.g. a geometric element like point, curve, etc. It is expected that this attribute will be specified at the direct position level only in rare cases.'

"
srsDimension="positiveInteger [0..1]

'The \"srsDimension\" is the length of coordinate sequence (the number of entries in the list). This dimension is specified by the coordinate reference system. When the srsName attribute is omitted, this attribute shall be omitted.'

"
axisLabels=" gml:NCNameList [0..1]

'Ordered list of labels for all the axes of this CRS. The gml:axisAbbrev value should be used for these axis labels, after spaces and forbiddden characters are removed. When the srsName attribute is included, this attribute is optional. When the srsName attribute is omitted, this attribute shall also be omitted.'

"
uomLabels=" gml:NCNameList [0..1]

'Ordered list of unit of measure (uom) labels for all the axes of this CRS. The value of the string in the gml:catalogSymbol should be used for this uom labels, after spaces and forbiddden characters are removed. When the axisLabels attribute is included, this attribute shall also be included. When the axisLabels attribute is omitted, this attribute shall also be omitted.'

">

<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]

<gml:description> ... </gml:description> [0..1]

<gml:name> ... </gml:name> [0..*]

'Multiple names may be provided. These will often be distinguished by being assigned by different authorities, as indicated by the value of the codeSpace attribute. In an instance document there will usually only be one name per authority.'

</gml:_Geometry>

Diagram

Element: _Geometry

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