org.openecomp.asdc.nodes.Connector:
  #Connector is the parent node of both WAN and LAN connectors. 
    derived_from: org.openecomp.asdc.nodes.Root
    requirements:
      - connectTo: 
          capability: org.openecomp.asdc.capabilities.Endpoint
          #the requirement can establish the relationship with a node providing such capability
          relationship: org.openecomp.asdc.relationships.ConnectsTo
          #occurrences means how many times this requirement can appear in one node. 
          occurrences: [1, UNBOUNDED]