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=head1 NAME

  XML::GDOME::XPath::NSResolver - Interface XPathNSResolver implementation.

=head1 SYNOPSIS

  $str = $xpnsresolv->lookupNamespaceURI($prefix);

=head1 METHODS

=over 4


=item $str = $xpnsresolv->lookupNamespaceURI($prefix);

Look up the namespace URI associated to the given namespace prefix. The XPath evaluator must never call this with a null or empty argument, because the result of doing this is undefined.

I<C<prefix>>: The prefix of the namespace to look for

I<Returns>: namespace URI


=back