66. A computer system for producing a digital form of a digital document, wherein the document can be one of several different types and with varying content, the system comprising: means for sending a request for at least part of a document; means for accessing a definition of additional content for a type of the document; means for generating an additional content component according to the definition of additional content for the type of the document; means for receiving a selected portion of the content of the document, the portion having been selected in accordance with the request; means for combining the additional content component with the content of the portion of the document to obtain the digital form of the document.
66. A computer system for producing a digital form of a digital document, wherein the document can be one of several different types and with varying content, the system comprising: means for sending a request for at least part of a document; means for accessing a definition of additional content for a type of the document; means for generating an additional content component according to the definition of additional content for the type of the document; means for receiving a selected portion of the content of the document, the portion having been selected in accordance with the request; means for combining the additional content component with the content of the portion of the document to obtain the digital form of the document. 75. The computer system of claim 66, further comprising: means for receiving a request for a part of a document, wherein the sent request corresponds to the received request; and means for packaging and transmitting the digital form of the document to another computer according to a communication protocol.