glance/api-ref/source/v2/samples/metadef-resource-type-assoc-list-response.json

{
    "resource_type_associations": [
        {
            "created_at": "2018-03-05T18:20:44Z",
            "name": "OS::Nova::Flavor",
            "prefix": "hw:"
        },
        {
            "created_at": "2018-03-05T18:20:44Z",
            "name": "OS::Glance::Image",
            "prefix": "hw_"
        }
    ]
}