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- From: David Megginson <david@megginson.com>
- To: XMLDev list <xml-dev-digest@ic.ac.uk>
- Date: Mon, 10 Jan 2000 11:35:49 -0500 (EST)
Stefan Haustein writes:
> I assume that xmlns and xmlns:* attributes do not occur in the
> Attributes object, right?
By default, no, unless explicitly requested by the client app. How
should we handle this? Here are my current thoughts:
Feature: http://xml.org/sax/features/namespaces (default = true)
TRUE false
------------------------------------------------------------------------
uri required optional
localName required optional
start/endPrefixMapping required optional
NS error reporting required forbidden
------------------------------------------------------------------------
Feature: http://xml.org/sax/features/rawnames (default = false)
true FALSE
------------------------------------------------------------------------
rawName required optional
xmlns* atts required forbidden
------------------------------------------------------------------------
Every SAX2 driver *must* support namespaces==true and rawnames==false,
and must use those as the default unless the client explicitly
requests otherwise.
The combination namespaces==false && rawnames==false is not allowed
(setting either to false automatically toggles the other to true).
> Is "no namespace" reported with a null or empty String (for
> interned Strings, the equals problem does not exist)?
Empty string sounds like a reasonable suggestion when Namespace
processing is being performed; null when it is not (so that a bugs in
code will show up sooner).
> Can I assume that namespace URIs are always interned?
That's a good question -- should SAX2 require that all names and
Namespace URIs be interned (i.e. == to the results of
java.lang.String.intern)?
All the best,
David
--
David Megginson david@megginson.com
http://www.megginson.com/
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