Schema Central > NIEM 3.1 > topology.xsd > universal
Advanced search
Need NIEM Help?

Recommended Reading:

Definitive XML Schema


Web Service Contract Design and Versioning for SOA


Advanced XML Applications



A gml:TopoSolid must indicate whether it is a universal topo-solid or not, to ensure a lossless topology representation as defined by Kuijpers, et. al. (see OGC 05-102 Topology IPR). The optional universal attribute of type boolean is used to indicate this and the default is fault. NOTE The universal topo-solid is normally not part of any feature, and is used to represent the unbounded portion of the data set. Its interior boundary (it has no exterior boundary) would normally be considered the exterior boundary of the data set.

Attribute information

Namespace: None

Schema document: external/ogc/gml/3.2.1/topology.xsd

Other attributes with the same name: universal

Type: xsd:boolean

Properties: Local, Unqualified


Used in

Site developed and hosted by Datypic, Inc.

Please report errors or comments about this site to