RFC 1523 (rfc1523) - Page 2 of 15
The text/enriched MIME Content-type
Alternative Format: Original Text Document
RFC 1523 A text/enriched MIME Content-type September 1993
This document defines a new MIME content-type, "text/enriched". The
content-type line for this type may have one optional parameter, the
"charset" parameter, with the same values permitted for the
"text/plain" MIME content-type.
The syntax of "text/enriched" is very simple. It represents text in
a single character set -- US-ASCII by default, although a different
character set can be specified by the use of the "charset" parameter.
(The semantics of text/enriched in non-ASCII character sets are
discussed later in this document.) All characters represent
themselves, with the exception of the "", ASCII 60 and 62). Each formatting command may be no
more than 60 characters in length, all in US-ASCII, restricted to the
alphanumeric and hyphen ("-") characters. Formatting commands may be
preceded by a solidus ("/", ASCII 47), making them negations, and
such negations must always exist to balance the initial opening
commands. Thus, if the formatting command "" appears at some
point, there must later be a "" to balance it. (NOTE: The 60
character limit on formatting commands does NOT include the "",
or "/" characters that might be attached to such commands.)
Formatting commands are always case-insensitive. That is, "bold" and
"BoLd" are equivalent in effect, if not in good taste.
Beyond tokens delimited by "", there are two other special
processing rules. First, a literal less-than sign ("