Guidance on Publishing Extensions

[marqh]

Prodcue guidance documentation for members publishing national extensions

• Publishing Platform - published by the member

• Change management

  • versioning
  • control

• Validation:

  • https://github.com/wmo-im/iwxxm/blob/master/IWXXM/common.xsd#L471
  • validation is dependent on published schema availability

[blchoy]

At WG-MIE/7 in 2021, the need to have a global repository for State IWXXM extensions was discussed. Two conclusions came out:

Decision MIE/7-04: Global Repository for State IWXXM Schema Extensions
That, the WG-MIE agree on the necessity to establish a global repository to collate and store information on State extensions to the IWXXM schemas.

Decision MIE/7-05: Designation of a Body to Host the Global Repository for State IWXXM Schema Extensions
That, the WG-MIE develop a Working Paper for METP/5 inviting the ICAO Secretariat to arrange for designation of a body to host a 24/7 supported repository (website or SharePoint) to collate and store information on State extensions to the IWXXM schemas.

So the global repository is a natural place for the guidance on developing extension.

[amilan17]

At this point, there are no plans to publish the extensions through WMO.

[mgoberfield]

As this is determined not to be WMO's responsibility, should this issue be closed?

[blchoy]

Technically we may want to say something on the best practices on writing an extension (e.g. choosing namespace). However, I think it will only cover one page or less. I will suggest to have it included in the documentation ICAO teams are producing. So yes, please have this closed.

[blchoy]

Actually there are activities within WG-MIE on IWXXM extension:

If materialized then this repository is the best location to host guidance on the preparation and maintenance of IWXXM extensions which covers not only technical stuff provided by TT-AvData but administrative functions to be determined by ICAO global and/or regional groups (e.g. following AIRAC requirements mentioned in Section 6.2 of ICAO Annex 15):

As this issue has been re-opened it could be time for us to prepare some technical inputs for the ICAO team to incorporate?