Attr createAttributeNS(String namespaceURI, String qualifiedName) throws DOMException;
namespaceURI
The unique identifier of the namespace for the Attr, or null for no namespace.
qualifiedName
The qualified name of the attribute, which should include a namespace prefix, a colon, and a local name.
A newly created Attr node with the specified name and namespace.
This method may throw a DOMException with one of the following code values in the following circumstances:
INVALID_CHARACTER_ERR
qualifiedName contains an illegal character.
NAMESPACE_ERR
qualifiedName is malformed, or there is a mismatch between qualifiedName and namespaceURI.
NOT_SUPPORTED_ERR
The implementation does not support XML documents and therefore does not implement this method.
createAttributeNS( ) is just like createAttribute( ) except that the created Attr node has a name and namespace instead of just a name. This method is useful only with XML documents that use namespaces.