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Artefacts to describe services

Service Definitions

• It is possible to test the draft schema:

  • available at https://github.com/stefanvaduva/service-metadata-schema/blob/stva-draft-definition/definition/SRV-DEF_SCHEMA.json.

  • let the group know of bugs/comments by mid-April.

• ICAO Job Card on service definitions

  • work has started and our inputs have been submitted

Service Overviews

• State Letter for PANS-IM is circulating so we can soon (probably Q4 2023) finish the handbook for service overviews and publish to the supporting material.

Service Descriptions

• no updates

Support

FAQ

• Questions to be answered (send suggestions to the group):

  • How do I describe a service that uses GraphQL?

    • Some example of services that use GraphQL were presented. This highlighted some key points.

      • The schema is self documenting (the same goal as Open API).

      • The service uses HTTP - a query that embeds elements from the schema is sent to the server, JSON responses are returned.

      • The schema can be based on the semantics of AIXM/AIRM.

      • It is possible to query, post and subscribe using GraphQL.

      • In general, GraphQL is better suited for mobile and light-weight applications. The current tests have not fosused on system-to-system exchanges.

      • The approach seems acceptable under the SWIM TI Yellow Profile.

    • An answer will be drafted and made available to the group. (See Documenting the use of standardised implementations for inspiration on the content of the answer.)

Service Metadata Schema

• Service Discovery Service

  • ICAO Job Card on registry interoperability has started work. It recognises three levels of registry interaction:

    • interoperable - queries are sent between registries based on agreed metadata; interconnected; and integrated

  • The focus is on the interoperable level for now.

• Version 1.0.0 of the service description schema is available for testing. Some group members have implemented it in their systems.

  • It will be made official once Registry CCB confirms it.

SWIM service ecosystem

Service Design Activities

• We will inform IMT on 18-19 April of the intention to look more at this.

• Added guidance on the use of CodeApplicationMessageExchangePatternType e.g. PUBLISH_SUBSCRIBE for services built around AMQP 1.0.

  • Should this be added to Documenting the use of standardised implementations as well?

Service Categories - Using the Service Type

• A meeting focusing on FF-ICE services and AMQP will take place on Monday 3rd April. Invitations will be sent soon.

Service Portfolio

• We will inform IMT on 18-19 April of the intention to look more at this.

• The page was updated with some new sources identified by the group.