Multipart/Related expects to know the content-type of the object root,
the body part with which to start processing. If the root is inside
a Multipart/Alternative, that adds an additional level of binding or
indirection that must be resolved before the MUA can determine which
helper application gets invoked.
Ed
On Thu, 02 Nov 1995 14:42:31 EST Al Gilman wrote:
To follow up on what Ed Levinson said ...
To state the problem: Multipart/Related requires a type
parameter which gives the type ot the object's root. If the root
is Multipart/Alternative, then the MUA doesn't know what the type
is until after the Alternative is resolved.
... What is it
that the MUA _needs_ to know that Multipart/Alternative doesn't tell it?