Global element abstract

AbstractGeometry

gml:AbstractGeometry

Defined in gml/geometryBasic0d1d-extract-v3_2_1.xsd:48

The AbstractGeometry element is the abstract head of the substitution group for all geometry elements of GML. This includes pre-defined and user-defined geometry elements. Any geometry element shall be a direct or indirect extension/restriction of AbstractGeometryType and shall be directly or indirectly in the substitution group of AbstractGeometry.

Type

gml:AbstractGeometryType

Related elements

Substitution group chain: AbstractGML abstract → AbstractObject abstract

Direct substitution members

AbstractGeometricAggregate abstract
AbstractGeometricPrimitive abstract

Concrete substitution alternatives

Elements that can actually appear in an instance document wherever this element's substitution group is accepted, gathered from the full substitution-group chain below it.

LineString
MultiSurface
Point
Polygon

Content model

Element structure

  • inherited from gml:AbstractGMLType 3 items
    • groupgml:StandardObjectPropertiesgmlBase-extract-v3_2_1.xsd:36 1..1
      • gml:descriptionReferencegmlBase-extract-v3_2_1.xsd:107 0..1 gml:ReferenceType

        The value of this property is a remote text description of the object. The xlink:href attribute of the gml:descriptionReference property references the external description.

      • gml:identifiergmlBase-extract-v3_2_1.xsd:117 0..1 gml:CodeWithAuthorityType

        Often, a special identifier is assigned to an object by the maintaining authority with the intention that it is used in references to the object For such cases, the codeSpace shall be provided. That identifier is usually unique either globally or within an application domain. gml:identifier is a pre-defined property for such identifiers.

      • gml:namegmlBase-extract-v3_2_1.xsd:112 0..unbounded gml:CodeType

        The gml:name property provides a label or identifier for the object, commonly a descriptive name. An object may have several names, typically assigned by different authorities. gml:name uses the gml:CodeType content model. The authority for a name is indicated by the value of its (optional) codeSpace attribute. The name may or may not be unique, as determined by the rules of the organization responsible for the codeSpace. In common usage there will be one name per authority, so a processing application may select the name from its preferred codeSpace.

Properties

Attributes

3
AttributeTypeUseDocumentation
srsName geometryBasic0d1d-extract-v3_2_1.xsd:37
gml:srsName
 anyURI optional —
srsDimension geometryBasic0d1d-extract-v3_2_1.xsd:38
gml:srsDimension
 positiveInteger optional —
inherited 1 attribute from base types
AttributeTypeUseDocumentationInherited from
id gmlBase-extract-v3_2_1.xsd:122
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.

 gml:AbstractGMLType