Gen2 feature: Data model

[UlfBj]

This chapter in the Gen2 CORE document needs to be updated to reflect that the data model to be used is VSS 2.0.

[UlfBj]

I assign myself to the task of updating this chapter.

[PatrickCQ]

Is it agreed by the automotive group that only VSS 2.0 is a valid datamodel for Gen2?

[UlfBj]

To my understanding the WG has decided that VSS 2.0 is the data model to use in Gen2.

[tguild]

this is partially resolved in #311 and 7f3ddfb but still some single tree leaning of #315 although softened with should instead of shall.

@UlfBj Ulf suggested on WG call being able to support both and leave to implementation to decide if it wants to add as a branch or link to external service.

https://www.w3.org/2019/12/03-auto-minutes

I think we should focus on service registry as likely to influence this and suggest that as topic for next call and here in this issue.