For those who care about ADL tooling and have implemented or use the AOM, for example in Archie, you will know that the AOM2 spec defines numerous validity codes like these.
If you are using an Archetype modelling tool, and it reports a validity error code like VSONCO (one that we are just upgrading), you can now use the codes as direct anchors added to the URL of the spec, i.e.
Tool builders might want to use this trick to build help / info links when the report such errors.