From: Eric Burger <[email protected]>
In the e-mail world, the ;handling property was created for gateways
(B2BUA's), so the gateway could know whether dropping a body part,
because the connected network/protocol could not handle that body
part, would render the message useless. For example, if I am using an
old version of Outlook, and I send you a Word file, the Word body part
is required for the relay, but the application/tnef (proprietary
Outlook stuff) is optional and the gateway can silently drop the part.
Ah! This is an interesting difference, as the concept is that the
handling property is "global", that is, if a part labeled "required"
is necessary for successful processing of the entire message. (As
opposed to the "local" concept, where it is only neccessary for the
successful processing of the containing multipart, whose processing
might not be necessary for processing the entire message.)
Of course, with one-level nesting, the two are equivalent.
Dale
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