| 摘要 |
The present invention is a protocol by which document handlers, document creators and output devices can communicate desired document attributes and available document handling capabilities to each other. If the available capabilities do not match the desired ones, the protocol provides the ability to change the desired capabilities so as to match what is available. The protocol also provides the ability to question a device as to its available capabilities. For output devices, the protocol enables a document handler to first provide a list of desired document handling capabilities to an output device and to receive information regarding whether or not the output device has the desired handling capabilities. Only once the document handling capabilities of the output device are acceptable may document data be sent. For document creators, the protocol enables a document handler to first provide a list of desired document attributes to a document creator and to receive information regarding whether or not the document creator can produce a document with the desired attributes. Only once the document attributes are acceptable is the document creator permitted to send the document data.
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