How to find elements by attribute namespace in XPath

Question

I\'m trying to use XPath to find all elements that have an element in a given namespace.

For example, in the following document I want to find the foo:bar

Answer 1

Use:

//*[namespace-uri()='yourNamespaceURI-here'
   or
    @*[namespace-uri()='yourNamespaceURI-here']
   ]

the predicate two conditions are or-ed with the XPath or operator.

The XPath expression thus selects any element that either:

• belongs to the specified namespace.
• has attributes that belong to the specified namespace.