querying an xml file with namespaces

[Michaël Michaud]

Hello,

I try to query an xml file with nux XQueryUtil.
First time, i get messages such as
  "Prefix md has not been declared"

I could get the result by adding something like
  "declare namespace md="http://www.isotc211.org/2005/gmd";"
in front of my query string.

Now I try to read the namespaces first with another query
  XQueryUtil.xquery(node, "//namespace::*")
to automatically add the namespaces in front of my main query,
but I get the message :
  "The namespace axis is not available in XQuery"

Question : what is the simple method to query an xml file using
namespaces ?

Thanks a lot.

Michaël