Global element abstract

AbstractGML

gml:AbstractGML

Defined in gml/gmlBase-extract-v3_2_1.xsd:25

The abstract element gml:AbstractGML is "any GML object having identity". It acts as the head of an XML Schema substitution group, which may include any element which is a GML feature, or other object, with identity. This is used as a variable in content models in GML core and application schemas. It is effectively an abstract superclass for all GML objects.

Type

gml:AbstractGMLType

Direct substitution members

AbstractGeometry 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

1 top-level

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

Attribute	Type	Use	Documentation
`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.