[Standards] XEP-0068 v. 1.2rc2

Peter Saint-Andre stpeter at stpeter.im
Mon Apr 30 19:03:57 UTC 2012

FYI, the document deprecating the "x-" convention has been approved by
the IESG. I think it's now safe to move forward with version 1.2 of
XEP-0068, and I'll ping the Council about that for its next meeting.
I've made some further small changes to XEP-0068 in order to track
changes to the xdash document, which you can find here:




-------- Original Message --------
Subject: Protocol Action: 'Deprecating the X- Prefix and Similar
Constructs in Application Protocols' to Best Current Practice
Date: Mon, 30 Apr 2012 11:16:53 -0700
From: The IESG <iesg-secretary at ietf.org>
To: IETF-Announce <ietf-announce at ietf.org>
CC: RFC Editor <rfc-editor at rfc-editor.org>

The IESG has approved the following document:
- 'Deprecating the X- Prefix and Similar Constructs in Application
  (draft-ietf-appsawg-xdash-05.txt) as Best Current Practice

This document is the product of the Applications Area Working Group.

The IESG contact persons are Pete Resnick and Barry Leiba.

A URL of this Internet Draft is:

   Technical Summary

Historically, designers and implementers of application protocols
have often distinguished between "standard" and "non-standard"
parameters by prefixing the latter with the string "X-" or similar
constructions.  In practice, this convention causes more problems
than it solves.  Therefore, this document deprecates the "X-"
convention for newly defined textual parameters in application

   Working Group Summary

The WG discussed the scope of the document, in particular if it
intends to change any existing IANA registries which use "X-"
namespace (or similar) and whether it applies to registries that
use numeric values. As per WG discussion, the answer to both
questions above is "no" and the document was clarified to reflect

   Document Quality

The document doesn't define a protocol. At least 1 specification already
voluntarily conforms to the recommendations specified in the document.


Alexey Melnikov <alexey.melnikov at isode.com> is the document shepherd.
Pete Resnick <presnick at qualcomm.com> is the cognizant AD.

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