<project default="main">
	<target name="main">
		<epsilon.emf.loadModel name="ecore" modelfile="models/Ecore.ecore" metamodeluri="http://www.eclipse.org/emf/2002/Ecore" read="true" store="false" />
		<epsilon.emf.loadModel name="OO" modelFile="models/OOInstance.ecore" metamodelUri="OO" read="false" store="true" />
		<epsilon.eol>
			var m : new EPackage;
			m.name = "m";
			
			for (i in 1.to(5)){
				var package : EPackage = new EPackage;
				package.name = "p" + i;
				m.eSubpackages.add(package);
			
				for (j in 1.to(3)) {
					
					var class : EClass = new EClass;
					class.name = "c" + i + "" + j;
					class.abstract = false;
					package.eClassifiers.add(class);
				}
			
			}
			
			for (c in EClass.allInstances) {
				c.eSuperTypes.add(EClass.allInstances.random());
			}
			
			for (c in EClass.allInstances) {
				//How can i add EAttribute (String type) ?
				c.eAttributes.add();
			}
			
      		<model ref="OO" />
		</epsilon.eol>
	</target>
</project>

var attr = new ECore!EAttribute;
// ...
eClass.eStructuralFeatures.add(attr);

			for (c in EClass.allInstances) {
				var attr = new EAttribute;
				attr.eAttributeType := EDataType.all.random();
				c.eStructuralFeatures.add(attr);
			}