tosca.nodes.missing_userId:
  derived_from: tosca.nodes.Root
  properties:
    size: 
      type: scalar-unit.size
      constraints:
        - greater_or_equal: 1 MB
    volume_id:
      type: string
      required: false
    snapshot_id:
      type: string
      required: false
  capabilities:
    attachment: 
      type: tosca.capabilities.Attachment