11. The process of claim 10, wherein the requested document is a digital document having fixed text content and fixed structure defined by descriptive markup defining a plurality of hierarchical elements providing an indication of structure of the digital document.
10. A computer-implemented process for making available digital documents of different types and content, and responsive to a request for one of the documents received from another computer according to a communication protocol, comprising the steps of: receiving an indication of a requested document; accessing a definition of additional content for a type of the requested document; generating an additional content component according to the definition of additional content for the type of the requested document; selecting at least a portion of the content of the requested document; combining the additional content component with the content of the selected portion of the requested document to obtain an output document; and packaging and transmitting the output document to the other computer according to the communication protocol.