Re: [Ltru] [psg.com #1061] eliminate (or proscribe)Private Use Tags

["Randy Presuhn" <randy_presuhn at mindspring.com>]

Hi -

> From: "Mark Davis" <mark.davis at jtcsv.com>
> To: "Randy Presuhn" <randy_presuhn at mindspring.com>; <ltru at ietf.org>
> Sent: Friday, July 08, 2005 6:16 PM
> Subject: Re: [Ltru] [psg.com #1061] eliminate (or proscribe)Private Use Tags
>

> > > Except that the "Private-use subtags MUST conform to the format
> constraints
> > > specified in the ABNF." is redundant. ALL subtags must conform to the
> format
> > > constraints specified in the ABNF. So I would just suggest the simpler
> >
> > The reason I included the redundant element is because there indications
> > that someone plans to disregard the ABNF in their implementation.  Such
> > is their right, but I don't want them to have any excuses when things
> > don't work correctly.
>
> The thing that bothers me is that some might conclude that *other* subtags
> don't have to conform to the format constraints. So how about:
>
> Private-use subtags, like all other subtags, MUST conform to the format
> constraints specified in the ABNF.
> >
> > > (2) "Private-use subtags have no meaning outside of a private agreement
> > > between parties. They may also be given different meanings by different
> > > private agreements between those or other parties. Thus they SHOULD NOT
> be
> > > used wherever there is alternative, and they SHOULD NOT be used in
> content
> > > or protocols intended for general use.
> > ...
> >
> > I could also live with this, if it will allow us to put this item to rest,
> > though I'd prefer if the second "SHOULD NOT" were a "MUST NOT".
>
> I thought of saying MUST NOT, but that is too strong. There may be a private
> use tag for something that is later added. You wouldn't want to say that the
> tag is then not conformant. So I suggest the language plus the format clause
> you wanted:
>
>
> (2) "Private-use subtags have no meaning outside of a private agreement
> between parties. They may also be given different meanings by different
> private agreements between those or other parties. Thus they SHOULD NOT be
> used wherever there is alternative, and they SHOULD NOT be used in content
> or protocols intended for general use. Private-use subtags, like all other
> subtags, MUST conform to the format constraints specified in the ABNF.
>
> What do you think of that?
...

This, too, would be ok for me.

Randy




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