477     public $namespaces;  variable in Auth_OpenID_Message
487         $this->namespaces = new Auth_OpenID_NamespaceMap();
586                 if ($this->namespaces->addAlias($value, $ns_key) === null) {
610             $ns_uri = $this->namespaces->getNamespaceURI($ns_alias);
618                     $this->namespaces->addAlias($ns_uri, $ns_alias, true);
644         $succeeded = $this->namespaces->addAlias($openid_ns_uri,
684         foreach ($this->namespaces->iteritems() as $pair) {
686             if ($this->namespaces->isImplicit($ns_uri)) {
863         $ns_alias = $this->namespaces->getAlias($namespace);
951                 $this->namespaces->add($namespace);
986               return $this->namespaces->getNamespaceURI($key);
988               $ns = $this->namespaces->getNamespaceURI($alias);