ode>true</code> for the procedure to be considered idempotent.</dd>
      <dt>params</dt>
      <dd>
            OPTIONAL. An Array value whose elements are either <a href="#ProcedureParameterDescription">Procedure
                Parameter Description</a>
            objects or String values. If an element each of uniquely describes a single
            parameter of the procedure. If the only description that is available of each parameter
            is its name, then a service MAY instead supply an Array