email MIME content-type parameters

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  An application needs some email generated and some of the content should
be in MIME format. Where I have run into a problem is the Content-Type
field. It is well defined and extensively discussed for type and subtype.
  The problem part is what the pre-defined parameters are. The common ones
like "boundary", "charset" and "name" are shown in examples but I cannot
find anywhere a definitive list of pre-defined Content-Type parameter
values, whether standard, common or convention.
  Can anyone point me to some documentation?

jmm (hyphen) list (at) sohnen-moe (dot) com
(Remove .AXSPAMGN for email)

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