Paul, It seems that you are correct. Lock is a part of: RFC 2518 WEBDAV http://ietf.org/rfc/rfc2518#45 No sure what is the difference between WebDav 2518 and RFC 7231 from a programming point of view. Because LOCK can be implemented easily in Seaside. regards, bruno -- Sent from: http://forum.world.st/Seaside-General-f86180.html