{
    "required_global_attributes":[
        "Conventions",
        "activity_id",
        "contact",
        "creation_date",
        "data_specs_version",
        "frequency",
        "grid",
        "grid_label",
        "institution",
        "institution_id",
        "license",
        "nominal_resolution",
        "product",
        "realm",
        "source_id",
        "table_id",
        "tracking_id",
        "variable_id",
        "variant_label"
    ]
}