Test NodeType inheritance

workspace/nodetypes/http%3A%2F%2Fdch.uni-koeln.de%2Ftosca%2Fnodetypes/DockerContainer/NodeType.tosca

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <Definitions xmlns="http://docs.oasis-open.org/tosca/ns/2011/12" xmlns:winery="http://www.opentosca.org/winery/extensions/tosca/2013/02/12" targetNamespace="http://dch.uni-koeln.de/tosca/nodetypes" id="winery-defs-for_dch_nodetypes-DockerContainer">
     <NodeType name="DockerContainer" targetNamespace="http://dch.uni-koeln.de/tosca/nodetypes" winery:bordercolor="#1793ef">
+        <DerivedFrom xmlns:nodetypes="http://opentosca.org/nodetypes" typeRef="nodetypes:DockerContainer"/>
         <winery:PropertiesDefinition elementname="properties" namespace="http://dch.uni-koeln.de/tosca/nodetypes/propertiesdefinition/winery">
             <winery:properties>
                 <winery:key>Port</winery:key>

workspace/nodetypes/http%3A%2F%2Fdch.uni-koeln.de%2Ftosca%2Fnodetypes/DockerEngine/NodeType.tosca

 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <Definitions xmlns="http://docs.oasis-open.org/tosca/ns/2011/12" xmlns:winery="http://www.opentosca.org/winery/extensions/tosca/2013/02/12" targetNamespace="http://dch.uni-koeln.de/tosca/nodetypes" id="winery-defs-for_dch_nodetypes-DockerEngine">
     <NodeType name="DockerEngine" targetNamespace="http://dch.uni-koeln.de/tosca/nodetypes" winery:bordercolor="#1793ef">
+        <DerivedFrom xmlns:nodetypes="http://opentosca.org/nodetypes" typeRef="nodetypes:DockerEngine"/>
         <winery:PropertiesDefinition elementname="properties" namespace="http://dch.uni-koeln.de/tosca/nodetypes/propertiesdefinition/winery">
             <winery:properties>
                 <winery:key>DockerEngineURL</winery:key>