The toolkit allows you to define processors in two locations. You can define the process in the toolkit processor definition file, dseproc.xml or in an independent XML file. Processors defined in an independent file are self-defined processors. From an implementation point of view, there is no difference between a self-defined processor and a non-self-defined processor. You would use self-defined processors when stopping your application to implement a new processor or to update an existing definition is not wanted or when the application cannot immediately download the full set of toolkit XML files.

The self-defined processor file can also contain definitions for the contexts and formats that the processor requires. It can also contain more than one processor definition.