element AbstractDatum
diagram AirQualityReporting_p1581.png
namespace http://www.opengis.net/gml/3.2
type gml:AbstractDatumType
properties
content complex
substGrp gml:Definition
abstract true
children gml:metaDataProperty gml:description gml:descriptionReference gml:identifier gml:name gml:remarks gml:domainOfValidity gml:scope gml:anchorDefinition gml:realizationEpoch
attributes
Name  Type  Use  Default  Fixed  annotation
idrequired      
documentation
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.
annotation
documentation
A gml:AbstractDatum specifies the relationship of a coordinate system to the earth, thus creating a coordinate reference system. A datum uses a parameter or set of parameters that determine the location of the origin of the coordinate reference system. Each datum subtype may be associated with only specific types of coordinate systems. This abstract complex type shall not be used, extended, or restricted, in a GML Application Schema, to define a concrete subtype with a meaning equivalent to a concrete subtype specified in this document.


XML Schema documentation generated by XMLSpy Schema Editor http://www.altova.com/xmlspy