GraphSchema.PORT_TYPE_ATTRIBUTE);
if (type == null) {
// Old graphs don't have the namespace for the attribute.
type = portElement.attributeValue(GraphSchema.PORT_TYPE_ATTRIBUTE);
}
PortImpl port;
if (GraphSchema.PORT_TYPE_WS_DATA.equals(type)) {
port = new WSPort(portElement);
} else if (GraphSchema.PORT_TYPE_SYSTEM_DATA.equals(type)) {
port = new SystemDataPort(portElement);
} else if (GraphSchema.PORT_TYPE_CONTROL.equals(type)) {