RFC 2987 (rfc2987) - Page 2 of 6
Registration of Charset and Languages Media Features Tags
Alternative Format: Original Text Document
RFC 2987 Charset and Languages Media Features Tags November 2000
Values appropriate for use with this feature tag:
The values are tokens as defined in [CHARSET]. The values can
only be compared for equality. Comparison is not case
sensitive.
The feature tag is intended primarily for use in the following
applications, protocols, services, or negotiation mechanisms:
Any protocol that uses media tags
Examples of typical use:
(| (charset=utf-8);q=1.0 (charset=iso-8859-1);q=0.9
(charset=utf-16);q=0.5 )
Related standards or documents:
"IANA Charset Registration Procedures", RFC 2978
Considerations particular to use in individual applications,
protocols, services, or negotiation mechanisms:
None
Interoperability considerations: Aliases for charsets should not be
used in media feature expressions because feature expression
manipulation tools may convert aliases to the the principal
name for the charset. Even though charset names are not
case-sensitive, values should be expressed as all lowercase
letters to increase the likelihood of interoperability. The
"charset" capability should always be indicated in
conjunction with any capability to handle textual data.
Security considerations:
If it is known that there is a security bug in the display of a
particular charset in a particular environment, knowing that a
device can accept that charset may slightly help an attacker.
Additional information:
None
Name(s) & email address(es) of person(s) to contact for further
information:
Paul Hoffman [email protected]>
Intended usage:
COMMON
Author/Change controller:
IETF
Hoffman Standards Track