OK -- sorry -- must have read it wrong
Andy
On Sun, Jul 31, 2016 at 6:57 PM, Dale R. Worley <wor...@ariadne.com> wrote:
> Andy Bierman <a...@yumaworks.com> writes:
> > The YANG 1.1 ABNF says:
> >
> > ;; An identifier MUST NOT start with (('X'|'x') ('M'|'m') ('L'|'l'))
> > identifier = (ALPHA / "_")
> > *(ALPHA / DIGIT / "_" / "-" / ".")
> >
> >
> > There is no explanation given why.
> > The same restriction was copied to RESTCONF, also without explanation.
> > Supposedly, XML does not allow identifiers to start with XML.
> >
> > Looks like this restriction only applies to the PITarget [17], not Name
> [5]
> > https://www.w3.org/TR/REC-xml/#sec-pi
> >
> > We have been applying this restriction to element names
> > but it only applies to processing instructions.
> >
> > IMO it should be removed.
> > It confuses people when they get an error for naming a data node
> > with a string that matches.
>
> Eh? Looking at "Extensible Markup Lanuage (XML) 1.0 (Fifth Edition)",
> section 3.1 (http://www.w3.org/TR/xml/#sec-starttags) says that the
> element name of a start in end tag is a "Name". Looking at section 2.3
> (http://www.w3.org/TR/xml/#sec-common-syn), I see
>
> Names beginning with the string "xml", or with any string which
> would match (('X'|'x') ('M'|'m') ('L'|'l')), are reserved for
> standardization in this or future versions of this specification.
>
> And since Yang data node names can appear as XML element names, Yang has
> to forbid node names that start with "XML".
>
> Dale
>
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