README
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                   CityGML version 0.4.0
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Welcome to CityGML Version 0.4.0. This directory contains
the XML schema files for CityGML, including referenced
schemas (GML, xAL), and some small example city models. 

The subdirectory "NoiseADE" contains the CityGML Noise ADE,
an application specific extension to include information
for noise dispersion simulation. It is used in the
implementation of the European Commission's directive
on the mapping and reduction of environmental noise.
See the CityGML website for more information.

CityGML is developed by the Special Interest Group 3D of 
the Spatial Data Infrastructure NRW. Further information 
is provided at http://www.citygml.org


Contents: 

	readme.txt			this file
	3.1.1 				XML schema files for GML 3.1.1 (OGC)
	CityGML.spp 			XMLSpy project file for CityGML XSD
	Citygml.xpr 			Oxygen XML editor project file for CityGML
	CityGML.xsd 			XML schema for CityGML
	CodeLists		 	attribute values for enumerative CityGML attributes
	Examples 			simple example files for CityGML: 
						Appearance, Simple Buildings, GenericObjects, Goups 
	history.txt			History of changes and additions to the CityGML schema
	NoiseADE			CityGML Noise Application Domain Extension and
						some small example instance documents					
	xAL 				schema file for xAL Address standard 
						(OASIS Consortium)