CDS Specification Version is ambiguous in the 2.0 specification #633
Description
During the January 2023 Connectathon a discussion around CDS Hooks 1.0 vs 2.0 determined that we had no discernible way to really know which 'specification version' we were using, but the IG (CRD) indicated we needed to use Hooks 2.0. In the 2.0 specification, the 'specification version' for all the Hooks is listed as 1.0, but the specification also indicates that (Hook Changes) "Because hooks are such an integral part of the CDS Hooks specification, hook definitions are associated with specific versions of the specification. The hook definition MUST include the version (or versions) of the CDS Hooks specification that it is defined to work with."
When reviewing each Hook, the metadata specificationVersion is always set to 1.0, so how can any Hook defined in the 2.0 specification be associated to the 2.0 specification version?
Proposal:
Depending on the intention of the specification version, update the specification to indicate which hook version aligns to which specification version (which may mean all current hooks are aligned to both 1.0 and 2.0) or update the section related to specification version in the changes-to-a-hook section to be clear about how a hook version and specification version are aligned and the expectation of compatibility (meaning, if the latest hook version of a hook aligns to only an older cds hooks specification version, that would still be considered the most up to date for use in the current specification version).