node_editor.py

    #: Blacklisted element from the node editor
    blacklist = (
        'outgoing',
        'incoming',
        #'default',
        'property',
        'auditing',
        'monitoring',
        #'extensionElements',
        # lanes (tPartitionElement is not known)
        'partitionElement',
        'partitionElementRef',
        # disabled because we don't know how to do yet. See
        # https://dev.tabtou.com/issues/263
        'implementRef',
        'evaluatesToTypeRef',
        # tDefinitions
        'importxx',
        'BPMNDiagram',
        'exporterVersion',
        'exporter',
        'targetNamespace',
        'typeLanguage',
        'expressionLanguage',

        'valueOf_',  # prefer to use content_ instead of valueOf.
        )