-- @name		DXF 
-- @version		1.1
-- @domains		DataBase
-- @authors		Peter Rosenthal
-- @date		2005/02/01
-- @description	This metamodel describes geometrical data in DXF (Drawing eXchange Format) which is the native vector file format of Autodesk s AutoCAD CAD application. This simplified DXF metamodel has an aggregation hierarchy. It consists of one DXF element that contains a number of Meshes (a 3D object based on a set of contiguous lines) which in turn consist of a number of Points (two consecutive points represent a line). Meshes and Points have names. Points have three coordinates, namely x, y and z.
-- @see			DXF - Autodesk Drawing eXchange Format, http://www.faqs.org/faqs/graphics/fileformats-faq/part3/section-45.html

package DXF {
	class DXF {
		reference meshes[*] ordered container : Mesh;	
	}

	class Mesh {
		attribute name : String;
		reference points[*] ordered container : Point oppositeOf mesh;	
	}

	class Point {
		attribute name : String;
		reference mesh : Mesh oppositeOf points;
		attribute x : Double;
		attribute y : Double;
		attribute z : Double;	
	}

}

package PrimitiveTypes {
	datatype Double;
	datatype Integer;
	datatype String;
}