IPSO Temperature Object using sdfChoice and OMA IDs

[akeranen]

Measurement_Quality_Indicator resource uses sdfChoice parsed from the description. All definitions also contain Object/Resource IDs.

[dnav]

A general question that came to me reading this PR:

In LwM2M data model, this object is defined as allowing multiple instances. Should this appear in the SDF model? Or is it managed during the composition, something like this:

"sdfThing": {
    "HigherThing": {
      "sdfObject": {
        "temperature" {
          "sdfRef": "oma:#/sdfObject/Temperature",
          "minItems": 0
        }
      }
    }
  }

[dnav]

It is probably just me, but I can't find mentions of such namespace-specific qualities in draft-13.

[akeranen]

The possibility to use namespace'd quality extensions is mentioned in section 2.3.3 but we still need to finalise the spec on this and add IANA registry for the namespaces (this is a different namespace than the definition namespace).

[akeranen]

Usually in SDF models you would leave ecosystem specific details (like OMA IDs) to the mapping file, but I happened to run the conversion tool with ID in-lining mode in this case.