Map of maps in TOSCA?

Dear TOSCA Experts,

is the following type definition correct in TOSCA YAML v1.1?

tosca.policies.nfv.VduScalingDeltas:

derived_from: tosca.policies.Root

properties:

initial_delta:

type: tosca.datatypes.nfv.VduLevel

required: false

aspect_deltas:

type: map # key: aspectId

required: false

entry_schema:

type: map # key: scalingDeltaId

entry_schema:

type: tosca.datatypes.nfv.VduLevel

targets: [ tosca.nodes.nfv.Vdu.Compute ]

We currently have the above definition in the ETSI NFV VNFD specifiction (alias SOL001), where we intend to define the aspect_deltas property of the VduScalingDeltas policy to be a map of map of VduLevels:

The definition seems logical, but it is not obvious whether it does or does not conform to the property definition syntax in TOSCA YAML v1.1 (section 3.5.8.4) which is:

<property_name>:

type: <property_type>

description: <property_description>

required: <property_required>

default: <default_value>

status: <status_value>

constraints:

- <property_constraints>

entry_schema:

description: <entry_description>

type: <entry_type>

constraints:

- <entry_constraints>

The idea is to be able to write policies like this:

- dbBackendCapacityVduScalingDeltas:

type: tosca.policies.nfv.VduScalingDeltas

properties:

aspect_deltas:

dbBackendCapacity:

delta_1:

number_of_instances: 2

delta_2:

number_of_instances: 1

targets: [ dbBackend ]

Thanks a lot for your answer in advance, kind regards,

Gábor

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