# Config file schemas These schemas describe Error Pages configuration file and used by: - Schemas naming agreement: `..schema.json`. ## Contributing guide If you want to modify the existing schema - your changes **MUST** be backward compatible. If your changes break backward compatibility - you **MUST** create a new schema file with a fresh version and "register" it in a [schemas catalog][schemas_catalog]. [schemas_catalog]:https://github.com/SchemaStore/schemastore/blob/master/src/api/json/catalog.json