* @return tag entity for this attribute group
*/
protected Entity getTagEntity() {
if (_tagEntity == null) {
if (_ownerElement != null){
IStructuredDocumentContext context = IStructuredDocumentContextFactory.INSTANCE.getContext(_ownerElement.getStructuredDocument(), 0);
if (context != null){
String uri = _uri != null ? _uri : IStructuredDocumentContextResolverFactory.INSTANCE.getDOMContextResolver(context).getNode().getBaseURI();
String tagName = _tagName != null ? _tagName : IStructuredDocumentContextResolverFactory.INSTANCE.getDOMContextResolver(context).getNode().getNodeName();
if (uri != null){
IProject project = IStructuredDocumentContextResolverFactory.INSTANCE.getWorkspaceContextResolver(context).getProject();