tosca.relationships.Root:
    description: This is the default (root) TOSCA Relationship Type definition that all other TOSCA Relationship Types derive from.
    attributes:
      tosca_id:
        description: A unique identifier of the realized instance of a Relationship Template that derives from any TOSCA normative type.
        type: string
      tosca_name:
        description: This attribute reflects the name of the Relationship Template as defined in the TOSCA service template. This name is not unique to the realized instance model of corresponding deployed application as each template in the model can result in one or more instances (e.g., scaled) when orchestrated to a provider environment.
        type: string
      state:
        description: The state of the relationship instance.
        type: string
        default: initial
    interfaces:
      Configure:
        type: tosca.interfaces.relationship.Configure        

  tosca.relationships.RoutesTo:
    derived_from: tosca.relationships.ConnectsTo
    description: This type represents an intentional network routing between two Endpoints in different networks.
    valid_target_types:
    - tosca.capabilities.Endpoint

  tosca.relationships.network.LinksTo:
    derived_from: tosca.relationships.DependsOn
    description: This relationship type represents an association relationship between Port and Network node types.
    valid_target_types:
    - tosca.capabilities.network.Linkable

  tosca.relationships.AttachesTo:
    derived_from: tosca.relationships.Root
    description: This type represents an attachment relationship between two nodes. For example, an AttachesTo relationship type would be used for attaching a storage node to a Compute node.
    valid_target_types:
    - tosca.capabilities.Attachment
    properties:
      location:
        description: 'The relative location (e.g., path on the file system), which
          provides the root location to address an attached node. e.g., a mount point
          / path such as ''/usr/data''. Note: The user must provide it and it cannot
          be "root".'
        type: string
        constraints:
        - min_length: 1
      device:
        description: The logical device name which for the attached device (which is represented by the target node in the model). e.g., '/dev/hda1'.
        type: string
        required: false
    attributes:
      device:
        description: 'The logical name of the device as exposed to the instance. Note:
          A runtime property that gets set when the model gets instantiated by the
          orchestrator.'
        type: string

  tosca.relationships.network.BindsTo:
    derived_from: tosca.relationships.DependsOn
    description: This type represents a network association relationship between Port and Compute node types.
    valid_target_types:
    - tosca.capabilities.network.Bindable

  tosca.relationships.HostedOn:
    derived_from: tosca.relationships.Root
    description: This type represents a hosting relationship between two nodes.
    valid_target_types:
    - tosca.capabilities.Container

  tosca.relationships.DependsOn:
    derived_from: tosca.relationships.Root
    description: This type represents a general dependency relationship between two nodes.
    valid_target_types:
    - tosca.capabilities.Node

  tosca.relationships.ConnectsTo:
    derived_from: tosca.relationships.Root
    description: This type represents a network connection relationship between two nodes.
    valid_target_types:
    - tosca.capabilities.Endpoint
    properties:
      credential:
        type: tosca.datatypes.Credential
        required: false

  org.openecomp.relationships.VolumeAttachesTo:
    derived_from: org.openecomp.relationships.AttachesTo
    description: This type represents an attachment relationship for associating volume
    properties:
      volume_id:
        description: The ID of the volume to be attached
        type: string
        status: SUPPORTED
        required: true
      instance_uuid:
        description: The ID of the server to which the volume attaches
        type: string
        status: SUPPORTED
        required: true
    attributes:
      show:
        description: Detailed information about resource
        type: string
        status: SUPPORTED

  org.openecomp.relationships.AttachesTo:
    derived_from: tosca.relationships.AttachesTo
    description: This type represents an attachment relationship
    properties:
      location:
        description: The relative location (e.g., path on the file system), which provides the root location to address an attached node.
        type: string
        status: SUPPORTED
        required: false