Published FDSN Reserved Header schema references undefined schema, update to 2020-12

[chad-earthscope]

The published schema definition for miniSEED 3 FDSN Reserved Headers is defined in JSON Schema specification "2023-07". This schema specification was not officially adopted by json-schema.org and has apparently been abandoned.

This leaves our FDSN Reserved Headers schema undefined without a root definition and not build-in support from tools. While this does not completely prevent header documents from being validated against our schema, it leaves gray area is something that should be addressed.

Convienently, the schema was originally developed according the released 2020-12 schema specification and remains fully compatible with that specification. With a small update, the schema definitions are now exactly the same with only the referenced specification being different:

ExtraHeaders-FDSN-v1.0.schema-2023-07.json

ExtraHeaders-FDSN-v1.0.schema-2020-12.json

I recommend a transition by updating the link published at FDSN Reserved Headers from:

https://raw.githubusercontent.com/FDSN/miniSEED3/main/extra-headers/ExtraHeaders-FDSN-v1.0.schema-2023-07.json

to

https://raw.githubusercontent.com/FDSN/miniSEED3/main/extra-headers/ExtraHeaders-FDSN-v1.0.schema-2020-12.json

[crotwell]

+1 on this, but should we also should add a short item to the "Changes" section to document it?

Is your thought that this is small enough that it does not require a new version and FDSN vote?

[chad-earthscope]

Definitely should add it to the Changes section.

I don't think it is a different version, our schema and information content remain exactly the same. It's just a different reference schema for validation (one that's actually usable). Personally I also don't think it needs a vote; that's up to the Chair/Vice Chair.