Re: [tosca] Propagation of default values in inheritance hierarchies: standpoint for TOSCA v1.2/v1.3?

[Tal Liron <tliron@redhat.com>]

As you point out, the spec wasn't entirely clear up to 1.3. I think somewhere it does point out that all keywords are inherited, but I can't find it right now...

In any case, I think all popular current implementations inherit the "default" keyword, as it does seem to be natural and intended.

On Fri, Aug 14, 2020 at 1:30 PM Marton, Gabor (Nokia - HU/Budapest) <gabor.marton@nokia.com> wrote:

Dear TOSCA Experts,

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in TOSCA v1.2 and v1.3, is the below example node template valid i.e. does its (required) property complex_1.example_1.property_1 have the value value_1?

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data_types:

 provider.datatypes.Example:

ÂÂÂ derived_from: tosca.datatypes.Root

ÂÂÂ properties:

ÂÂÂÂÂ property_1:

ÂÂÂÂÂÂÂ type: string

ÂÂÂÂÂÂÂ default: value_1

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 provider.datatypes.Complex:

ÂÂÂ derived_from: tosca.datatypes.Root

ÂÂÂ properties:

ÂÂÂÂÂ example_1:

ÂÂÂÂÂÂÂ type: provider.datatypes.Example

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node_types:

 provider.nodes.Example:

ÂÂÂ derived_from: tosca.nodes.Root

ÂÂÂ properties:

ÂÂÂÂÂ complex_1:

ÂÂÂÂÂÂÂ type: provider.datatypes.Complex

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topology_template:

 node_templates:

ÂÂÂ example:

ÂÂÂÂÂ type: provider.nodes.Example

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Propagation of default values is not explicitly covered by TOSCA v1.2/v1.3.

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In the TOSCA v2.0 draft, I can see one sentence that makes me answer the above question affirmatively: âdefault: a new definition is unrestricted and will overwrite the one inherited from the property definition in the parent entity type definition" (4.4.5.5 Refinement rules).

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Greetings,

Â

GÃbor

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