{title:'Part Marshallers', updated:'8.1.0,9.0.0'}

Juneau comes with three basic marshaller types for serializing and parsing Header, Query, Form, and Path parts:

By default, the REST API uses the OpenAPI serializer and parser which allows for schema-based marshalling. You also have the option to use UON marshalling which is schema-less but allows for JSON-equivalent data structures (object/array/primitives/...) using URL-encoding notation. This can be done by overriding the part marshallers through the following APIs:

The OpenAPI marshallers themselves also have the ability to support UON notation for individual parts via the schema itself:

| @Query(..., schema=@Schema(format="uon")) Map<Integer,MyBean> myMap