RE: [tosca] Propagation of default values in inheritance hierarchies: st

Iâm not sure there is a âpropagationâ (or inheritance) issue here. This seems to be a very straightforward example where (as Gabor states) the resulting value is indeed 1.

Chris

From: tosca@lists.oasis-open.org <tosca@lists.oasis-open.org> On Behalf Of Tal Liron
Sent: Saturday, August 15, 2020 12:44 PM
To: Marton, Gabor (Nokia - HU/Budapest) <gabor.marton@nokia.com>
Cc: tosca@lists.oasis-open.org; Nemeth, Denes (Nokia - HU/Budapest) <denes.nemeth@nokia.com>; Nguyenphu, Thinh (Nokia - US/Dallas) <thinh.nguyenphu@nokia.com>
Subject: Re: [tosca] Propagation of default values in inheritance hierarchies: standpoint for TOSCA v1.2/v1.3?

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,

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?

data_types:

provider.datatypes.Example:

    derived_from: tosca.datatypes.Root

    properties:

      property_1:

        type: string

        default: value_1

provider.datatypes.Complex:

    derived_from: tosca.datatypes.Root

    properties:

      example_1:

        type: provider.datatypes.Example

node_types:

provider.nodes.Example:

    derived_from: tosca.nodes.Root

    properties:

      complex_1:

        type: provider.datatypes.Complex

topology_template:

node_templates:

    example:

      type: provider.nodes.Example

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

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).

Greetings,

GÃbor

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