XEP-0273 (Stanza Interception and Filtering Technology (SIFT)) has been Deferred because of inactivity.
Abstract: This specification defines an XMPP protocol extension that enables a client to exercise control over the XML stanzas it will receive from the server by instructing the server to intercept and filter inbound stanzas. URL: http://xmpp.org/extensions/xep-0273.html If and when a new revision of this XEP is published, its status will be changed back to Experimental.
