node_types:
  onap.nodes.Service:
    description: |
      a base of the ONAP concrete service types generated by SDC
    derived_from: tosca.nodes.Root
    properties:
      catalog_info:
        type: onap.datatypes.CatalogInfo
        description:
        required: true
        # generated by Design Time Catalog once, then never changed
      classification:
        type:
          type: string
        role:
          type: string
        function: 
          type: string
    attributes:
      instance_name: 
        type: string
        description: the name of the run-time instance of in the deployment
    interfaces:
      # TODO: define service-level interfaces