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Date: Tue, 13 Jun 2006 09:39:50 -0500
From: "Dominique Devienne" <ddevienne@gmail.com>
To: "Ant Developers List" <dev@ant.apache.org>
Subject: Re: QName in DynamicAttributeNS
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References: <448E926D.1060203@apache.org> <448E99CE.5020903@apache.org>
	 <dffc72020606130644r722d4a2aoc21a8bd920dd54b@mail.gmail.com>
	 <448EC7DE.2030004@apache.org>
	 <dffc72020606130720x277548c8l6a3412996a57d9ec@mail.gmail.com>

On 6/13/06, Peter Reilly <peter.kitt.reilly@gmail.com> wrote:
> The prefix for elements (as against attributes) are retained.
> ProjectHelper2 called UE.setQName(qName) with the
> name it receives from the sax.
>
> Something needs to be done for attributes..

Namespaces are used to avoid name collision, and in Ant to locate the
right implementation class. That's necessary for top-level tasks, and
for nested elements in tasks/types having add(Xyx) methods.

Attributes in Ant OTOH, are always "resolved" relative to their
element. Their can't be any ambiguity ATM for attribute. Ant doesn't
support namespace'd attribute at all, AFAIK.

Also, remember that attributes don't inherit the namespace of their
element, and are always in the "" namespace, unless explicitly
qualified with a prefix. As I write above, Ant doesn't support them
for introspected class.

Using namespace prefixes is dangerous, because they can change from
element to element, depending on while namespaces are in scope, and we
can have different prefixes for the same NS URI, or the same prefix
for different NS URIs depending on the element (although this is evil,
XML supports it).

XmlFragment is already not "exact" XML, as all text nodes, even with
nested element in between them, are merged together. I'm not sure it's
worth it to be exact XML... --DD

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