Hi,

On Wed, Dec 28, 2011 at 12:41 PM, Ista Pouss <istaous@gmail.com> wrote:
> How is it possilbe ? What is the good thing to do to register a namespace ?

You probably already have the namespace registered with another prefix.

When conditionally registering a namespace like you're doing, it's
usually best to use the getNamespacePrefix() method to check for the
existence of a mapping of a given namespace URI.

BR,

Jukka Zitting