Registration of media type text/vcard

[Paul Libbrecht]

The following might be a personal opinion:

What is the advantage of having a charset parameter?

When I see how this has caused issues with faulty transmissions (most  
commonly servers claiming media type text/html; charset=iso-8859-1  
without certainty that it is in the right charset), I would like to  
discourage any charset parameter anywhere possible.

 From your registration the parameter brings no information (am I  
right?). So why include it and not simply rely on the Byte-Order-Mark?

Paul



Le 18 août 2010 à 18:21, Simon Perreault  
<simon.perreault at viagenie.ca> a écrit :

>   Type name:  text
>
>   Subtype name:  vcard
>
>   Required parameters:  none
>
>   Optional parameters:  version
>
>      The "version" parameter is to be interpreted identically as the
>      VERSION vCard property.  If this parameter is present, all vCards
>      in a text/vcard body part MUST have a VERSION property with value
>      identical to that of this MIME parameter.
>
>   Encoding considerations:  The "charset" MIME parameter, if present,
>      MUST be set to "UTF-8", as defined in [RFC3629].
>
>   Security considerations:  See Section 9.
>
>   Interoperability considerations:  The text/vcard media type is
>      intended to identify vCard data of any version.  There are older
>      specifications of vCard [RFC2426][oldreference_VCARD] still in
>      common use.  While these formats are similar, they are not
>      strictly compatible.  In general, it is necessary to inspect the
>      value of the VERSION property (see Section 6.7.9) for identifying
>      the standard to which a given vCard object conforms.
>
>      In addition, the following media types are known to have been  
> used
>      to refer to vCard data.  They should be considered deprecated in
>      favor of text/vcard.
>
>      *  text/directory
>
>      *  text/directory; profile=vcard
>
>      *  text/x-vcard
>
>   Published specification:  draft-ietf-vcarddav-vcardrev-13
>
>   Applications that use this media type:  They are numerous, diverse,
>      and include mail user agents, instant messaging clients, address
>      book applications, directory servers, customer relationship
>      management software, etc.
>
>   Additional information:
>
>      Magic number(s):
>
>      File extension(s):  .vcf
>
>      Macintosh file type code(s):
>
>   Person & email address to contact for further information:  Simon
>      Perreault <simon.perreault at viagenie.ca>
>
>   Intended usage:  COMMON
>
>   Restrictions on usage:  none
>
>   Author:  Simon Perreault and Pete Resnick
>
>   Change controller:  IETF
>
> -- 
> NAT64/DNS64 open-source --> http://ecdysis.viagenie.ca
> STUN/TURN server        --> http://numb.viagenie.ca
> vCard 4.0               --> http://www.vcarddav.org