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Secure XML: The New Syntax for Signatures and Encryption by Kitty Niles, Donald E. Eastlake

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E.3. Processing Models

The paper-oriented and protocol-oriented perspectives have very different views on what is likely to happen to an object.

E.3.1. Amount of Processing

PAPER: The model involves a quasi-static object similar to a piece of paper. With pieces of paper, you simply transfer them as a whole, from one storage area to another, or add signatures, date stamps, or similar adjuncts. (Possibly, you might want an extract from a document or seek to combine multiple documents into a summary, but that isn't the common case.)

PROTOCOL: The standard model of a protocol message is as an ephemeral, composite, multilevel object that a source process creates and that a destination process consumes. The source process constructs such a message ...

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