Representing IP addresses in XML Schema

[Curt Arnold]

Sorry to harp on it, but this is another example of
the general usefulness of support for lists in XML
Schema as I tried to strongly lobby (as much as you
can outside the W3C) earlier this month.  See my
comments on the schema comments archive,
http://lists.w3.org/Archives/Public/www-xml-schema-comments/1999OctDec/0038.html.

Lists would also be useful for DNS names.

--- Leigh Dodds <ldodds at ingenta.com> wrote:
> > > > However, this is not satisfactory - it allows
> each field in the IP to
> > > > have values from 000-999.  I want to restrict
> the possible values to:
> > > > [0-255].[0-255].[0-255].[0-255]
> > > 
> > > You can avoid the problem by storing the IP as a
> hex address, as in:
> > > 
> > > ff.ff.ff.ff
> > > 
> > Thanks Ray.  An interesting choice of words - "You
> can avoid the
> > 'problem' ...".  I think that it is a "problem" if
> such a common, simple
> > datatype cannot be expressed directly, and one is
> forced to resort to
> > indirect means of expressing what is desired. 
> Yes?  /Roger
> 
> It also becomes trickier if you want to disallow IP
> addresses such 
> as 127.0.0.1, 0.0.0.0, etc.
> 
> L.
> 
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