TGraph 2;

Schema de.uni_koblenz.xmltg.XMLSchema;
GraphClass XMLGraph;

abstract VertexClass Node;
abstract VertexClass NamespacedElement {nsURI: String, nsPrefix: String};
abstract VertexClass Referent;
VertexClass Element: Node, NamespacedElement {name: String, declaredNamespaces: Map<String, String>};
VertexClass RootElement: Element;
VertexClass CharContent: Node, Referent {content: String};
VertexClass Attribute: NamespacedElement, Referent {name: String, value: String};

EdgeClass HasAttribute from Element (1,1) role element to Attribute (0,*) role attributes aggregation composite;
EdgeClass References from Referent (0,*) role referents to Element (0,*) role targets;

abstract EdgeClass HasContent from Element (0,1) role parent to Node (0,*) role contents aggregation composite;
EdgeClass HasChild: HasContent from Element (0,1) to Element (0,*) role children aggregation composite;
EdgeClass HasCharContent: HasContent from Element (0,1) to CharContent (0,*) role charContents aggregation composite;