eHN value set changes v1.15

Changes:

• Update to eHN guidelines document for value sets, version 1.15:

  1. New vaccine entry added: “Bimervax“, ID'd as “EU/1/22/1709”.
     This new entry does not have an explicit version because it's an EMA-approved vaccine, and EMA has their own versioning system.
  2. Addition of a marketing authorization holder or manufacturer “Hipra Human Health S.L.” for the new vaccine entry, ID'd as “ORG-100036914”.
  3. Addition of a vaccine encoding instruction corresponding to the combination of sub items 1 and 2.

  The guidelines document v1.15 has been adopted and published through the eHealth network page on the EU DCC.

• Implement validation of valuesets against the EU DCC Schema.

  • Implement a Git hook that runs that validation prior to committing.

• Improve the documentation - README an VERSIONING - in various ways.

  • Fix not-yet-renamed links to repos which formerly were prefixed with "ehn-dcc-".