FreeOpcUa / python-opcua

        node = self._get_node(obj)

        attrs = ua.ReferenceTypeAttributes()

        if obj.desc:

            attrs.Description = ua.LocalizedText(obj.desc)

        attrs.DisplayName = ua.LocalizedText(obj.displayname)

        if obj. inversename:

            attrs.InverseName = ua.LocalizedText(obj.inversename)

        if obj.abstract:

            attrs.IsAbstract = obj.abstract

        if obj.symmetric:

            attrs.Symmetric = obj.symmetric

        node.NodeAttributes = attrs

        res = self.server.add_nodes([node])

        self._add_refs(obj)

        return res[0].AddedNodeId

    def add_datatype(self, obj):

        node = self._get_node(obj)

        attrs = ua.DataTypeAttributes()

        if obj.desc:

            attrs.Description = ua.LocalizedText(obj.desc)

        attrs.DisplayName = ua.LocalizedText(obj.displayname)

        if obj.abstract:

            attrs.IsAbstract = obj.abstract

        if obj.desc:

            attrs.Description = ua.LocalizedText(obj.desc)

        attrs.DisplayName = ua.LocalizedText(obj.displayname)

        if obj.abstract:

            attrs.IsAbstract = obj.abstract

        node.NodeAttributes = attrs

        res = self.server.add_nodes([node])

        self._add_refs(obj)

        return res[0].AddedNodeId

    def _add_refs(self, obj):

        if not obj.refs:

            return

        refs = []

        for data in obj.refs:

            ref = ua.AddReferencesItem()

            ref.IsForward = True

            ref.ReferenceTypeId = self.to_nodeid(data.reftype)

            ref.SourceNodeId = ua.NodeId.from_string(obj.nodeid)

            ref.TargetNodeClass = ua.NodeClass.DataType

            ref.TargetNodeId = ua.NodeId.from_string(data.target)

            refs.append(ref)