RE: Can an element have 2 namespaces?

While I follow this list, it's been a while since I've posted. There are five namespaces declared if I read this correctly. The default namespace is http://purl.org/rss/1.0/. That is to say, unless an element or an attribute has an overriding namespace declared

ex: <rdf:xxx></rdf>

an element or attribute is assigned to the default namespace.

It looks like there's a problem with your parser, but I could be wrong as I am a little rusty.
-- 
Charles Knell
cknell@xxxxxxxxxx - email



-----Original Message-----
From:     cert21 <cert21@xxxxxxx>
Sent:     Mon, 09 Nov 2009 17:47:49 -0500
To:       xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject:   Can an element have 2 namespaces?

I am having trouble parsing this rss 1.0 feed
The reason is that it appears that there are 2 different namespaces 
declared in the root document

This is how the document starts:

<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:admin="http://webns.net/mvcb/" xmlns="http://purl.org/rss/1.0/">

The parser (in php, a DOMDocument class) reports the namespace to be

http://www.w3.org/1999/02/22-rdf-syntax-ns#

but why then they declared another namespace with 
xmlns="http://purl.org/rss/1.0/"

Is it even a valid way to declare 2 namespaces together like this?

Anyway, which one is considered to be the correct one?