>Ha. Misread your requirements - thought you just wanted to check whether it was already defined. If you want to populate the NameTable with all of the namespaces used in a specific piece of XML I came across this approach:

> XmlDocument doc = new XmlDocument();
> doc.LoadXml(*whatever*);
>XmlNodeList nameSpaceList = doc.SelectNodes(@"//namespace::*[not(. = ../../namespace::*)]");
> var _xmlNSmgr = new XmlNamespaceManager(doc.NameTable);
>foreach (XmlNode nsNode in nameSpaceList)
>            {
>                _xmlNSmgr.AddNamespace(nsNode.LocalName, nsNode.Value);
>            }

Only made a quick test but it seems to work......

Ok, that is very interesting.

Thanks for sharing this.