std::vector< Result > ElementPresentValidator::VerifyElementPresent( 
    const QName &element_qname, 
    const std::vector< QName > &possible_parents,
    const xc::DOMDocument &document )
{
    xc::DOMNodeList *matching_elements = document.getElementsByTagNameNS(
        toX( element_qname.namespace_name ),  toX( element_qname.local_name ) );

    std::vector< Result > results;

    if ( matching_elements->getLength() < 1 )
    {
        xc::DOMNode* parent = xe::GetFirstAvailableElement( possible_parents, document );

        Result result = parent != NULL                                                   ?
                        ResultWithNodeLocation( ERROR_XML_ELEMENT_NOT_PRESENT, *parent ) :
                        Result( ERROR_XML_ELEMENT_NOT_PRESENT );
                        
        result.AddMessageArgument( element_qname.local_name );
        results.push_back( result );
    }

    return results;
}