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Reply-To: <Jared.Williams1@ntlworld.com>
To: "'George Schlossnagle'" <george@omniti.com>,
	"'PHPdev List'" <internals@lists.php.net>
Date: Fri, 13 May 2005 22:29:59 +0100
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Message-ID: <20050513212830.VPWD1352.aamta04-winn.mailhost.ntl.com@win2ks>
Subject: RE: [PHP-DEV] annoying DOM limitation
From: jared.williams1@ntlworld.com ("Jared Williams")
References: <4FFCA3A4-8367-432F-A665-391F804F6C8A@omniti.com>

> 
> While hacking on a PHPDoc -> WSDL generator, I ran into an 
> annoying limitation in the dom extension: you can't add a 
> namespace to a dom document unless you have an element in 
> that namespace.  Why might you want to do this?  Well, a 
> common thing is to have your xml-schema types to be specified 
> as attribute values, i.e.
> 
> <element name="foo" type="xsd:string"/>
> 
> for this to work I need xsd to be an alias for 
> http://www.w3.org/2001/ XMLSchema.
> 
> To work around this, I added a DomElement::addNS($uri, 
> $alias) method to Dom.  Adding the namespace 'manually' as an 
> attribute on an element does not work.
> 
> I know this isn't part of the Dom spec, but it's incredibly useful.   
> Does anyone (Rob, Chegru) mind me adding it to HEAD?


Hmm, I have been doing this via setAttributeNS(), with the XML namespace namepace


define('NS_NS', 'http://www.w3.org/2000/xmlns/');
define('NS_XLINK', 'http://www.w3.org/1999/xlink');

$document = new DOMDocument();
$root = $document->createElement('root');
$document->appendChild($root);
$root->setAttributeNS(NS_NS, 'xmlns:xlink', NS_XLINK);
echo $document->saveXML();

Haven't encountered any problems with this method, seems to produce XML (SVG in this case) fine.

Jared