Confusion with Namespaces?

[Tim Bray]

At 01:45 PM 13/04/98 -0400, Tyler Baker wrote:
>In the 1.0 XML Namespaces specification a namespace PI is defined as
>follows:
>
>'<?xml:namespace' (S (PrefixDef | NSDef | SrcDef))+ '?>'
>
>>From this it looks like a particular namespace must have either one or
>more PrefixDef's, NS'Def's, or SrcDef's in any particular order so long
>as there is at least one of these.  But then the following is said:
>
>Namespace Constraint: Required Parts
>A namespace declaration must contain exactly one NSDef, exactly one
>PrefixDef and zero or one SrcDef.

This is because a majority of the WG didn't want to specify the
order in which they can appear.  So to write a regexp that allows
one ns & one prefix & zero or one src, in any order, gets pretty
big & ugly, unless you have something like the SGML &-connector. -Tim


xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)