{
    "$id": "https://gros.liacs.nl/schema/metadata/projects_sources.json",
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "title": "Sources for projects",
    "$ref": "#/$defs/projects_sources",
    "$defs": {
        "projects_sources": {
            "type": "object",
            "patternProperties": {
                ".*": {"$ref": "project_sources.json#/$defs/project_sources"}
            }
        }
    }
}