Document processing system utilizing document service cards to provide document processing services
 A user extensible document processing system. The extensible document processing system includes a document processing platform such as a digital copier,control forms for specifying requested services and instructions and one or more document service cards. User provided document processing services are contained on document service cards. A set of basic document processing services are provided by the document processing platform. The document processing platform includes one or more ports for coupling to document service cards, a registration device for registering services into a service taxonomy, a deregistration device for deregistering services from the service taxonomy, a service dispatcher for identifying the service to process a control form using the service taxonomy, and a scanner for creating a digital representation of a paper based document. The document processing platform registers document services upon detecting the coupling of a document services card. 
Xerox Corporation
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Daniel M. Daniel G. D. Austin Mark J.
Russell Bobrow Henderson, Jr. Stefik