Move over GDD Definitions

[nytamin]

This PR copies the GDD definitions from the superfly repo into Ograf, as discussed in #24.

closes #24

[nytamin]

Notes from Working Group meeting 2026-01-21:

Due to the size of this PR, it would be good if we could have a few pairs of extra eyes testing this before merging it.
It would be useful with some testing instructions as well.

[nytamin]

Test instructions / How to test JSON-Schemas:

It is a little bit tricky to test JSON-schemas locally, but here is how I do it:

Preparing for test

Prerequisites

• VSCode or other IDE that supports JSON-Schemas
• Node.js
• git

I start by cloning this repo, and checking out the correct branch:

> git clone https://github.com/ebu/ograf.git
> cd ograf
> git checkout fix/move-gdd-definitions

I've made a script to make it easier to test JSON-Schemas locally. It replaces all references in the JSON-schemas from https://ograf.ebu.io/** to http://localhost:8080/**:

> node v1/typescript-definitions/scripts/local-testing.js

And now, you can serve the JSON-Schemas from your localhost!

> npm install --global http-server
> http-server -p 8080

You should now be able to see the JSON-Schemas at http://127.0.0.1:8080/v1/specification/json-schemas/graphics/schema.json

Testing JSON Schemas

You can test your JSON-Schemas by changing the $schema property in the OGraf manifest to

  "$schema": "http://localhost:8080/v1/specification/json-schemas/graphics/schema.json",

You your IDE will now use your local JSON Schemas and provide intellisense and feedback.

[dvdeurse]

@nytamin I followed your instructions and experimented a bit with various GDD types, looks good to me!