Serializing xml nodes

Hi guys,

I'm working on a WebDAV implementation, and for convenience i'd like  
to serialize the full xml namespace + tag name into a single string.

So far I've used:

DAV:#resourcetype

But, I realize this isn't ideal because XML namespaces can contain the  
#. I've seen some WebDAV use :

{DAV:}resourcetype

Would this be the preferred serialization method?

Evert