header
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... a continuation mechanism for long parameter values to
avoid problems with header line wrapping.
...
... content-type
and content-disposition header fields in Internet email. This
inherently imposes three crucial limitations:
...
... Lines in Internet email header fields are folded according to
RFC 822std11(-> 2822prop) folding rules. This makes long parameter values ...
... MIME headers, like the RFC 822std11(-> 2822prop) headers they often appear in,
are limited to 7bit US-ASCII, and the encoded-word mechanisms
...
... MIME media type or disposition parameter values do not interact
well with header line wrapping conventions. In particular, proper
header line wrapping depends on there being places where linear
...
... well with header line wrapping conventions. In particular, proper
header line wrapping depends on there being places where linear
whitespace (LWSP) is allowed, which may or may not be present in a
parameter value ...
... MIME states that parameters are not order sensitive.
Note that while MIME does prohibit modification of MIME
headers during transport, it is still possible that parameters
will be reordered when user agent ...
... character sets in RFC 822std11(-> 2822prop)
message header comments, phrases, and any unstructured text field.
This is done by defining an encoded word construct which can appear
in any of these places. Given that these are fields intended for
...
... MIME) Part Three: Representation of Non-ASCII Text in Internet Message Headers", RFC 2047draft, University of Tennessee, December 1996. ...
... Troost, R., Dorner, S., and Moore, K., "Communicating Presentation Information in Internet Messages: The Content-Disposition Header", RFC 2183prop, August 1997. ...