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<body class="article">
<div id="header">
<h1>Status Levels for SP RFCs</h1>
<div class="details">
<span id="author" class="author">Garrett D'Amore</span><br>
<span id="email" class="email"><a href="mailto:garrett@damore.org">garrett@damore.org</a></span><br>
<span id="revnumber">version 1.0,</span>
<span id="revdate">2017-11-07</span>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p><span class="image"><img src="https://img.shields.io/badge/status-draft-yellow.svg?style=for-the-badge" alt="draft"></span></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_status_levels_for_sp_rfcs">Status Levels for SP RFCs</h2>
<div class="sectionbody">
<div class="ulist">
<ul>
<li>
<p>Status: draft</p>
</li>
<li>
<p>Authors: <a href="mailto:garrett@damore.org">Garrett D&#8217;Amore</a></p>
</li>
<li>
<p>Version: 1.0</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_abstract">Abstract</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This document defines the meaning of the "Status" keyword used
to label RFC documents for the Scalability Protocols suite of
protocols.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_license">License</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Copyright 2017 <a href="mailto:info@staysail.tech">Staysail Systems, Inc.</a></p>
</div>
<div class="paragraph">
<p>This specification is licensed under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with the
License.
You may obtain a copy of the license
<a href="http://www.apache.org/licenses/LICENSE-2.0">online</a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_language">Language</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD",
"SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be
interpreted as described in <a href="https://tools.ietf.org/html/rfc2119">RFC 2119</a>.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_goals">Goals</h2>
<div class="sectionbody">
<div class="paragraph">
<p>In order to ensure compatibility across different implementations of the
SP protocols, it is important to document the details of those protocols,
including expected mandatory and optional behaviors. These are documented
in the form of RFC (Request for Comments) documents, which are posted online
for review and reference by implementors.</p>
</div>
<div class="paragraph">
<p>A document undergoes a lifetime transition. During its early phases, the
authors and initial implementors may be uncertain about the details of
the protocols, and the document itself may be evolving rather quickly.
Conversely, at some point in the near the end of a document&#8217;s life time,
a protocol may be deprecated, indicating that it should not be used by
new implementations, or even retired entirely, where it should not be
in use at all.</p>
</div>
<div class="paragraph">
<p>Understanding the phase a document (and the protocol described) is in
is important for potential implementors, in order to avoid certain
development risks and set expectations for likely changes.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_levels">Levels</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="draft">Draft <span class="image"><img src="https://img.shields.io/badge/status-draft-yellow.svg?style=for-the-badge" alt="draft"></span></h3>
<div class="paragraph">
<p>All RFCs start life as <em>Draft</em> status. These may very from extremely
preliminary documents with no existing complete implementation,
to documents where several implementations exist, but which
have not been sufficiently reviewed by the SP community.</p>
</div>
<div class="paragraph">
<p>The yellow color in the badge serves as a warning against depending upon
the document details too deeply.</p>
</div>
</div>
<div class="sect2">
<h3 id="stable">Stable <span class="image"><img src="https://img.shields.io/badge/status-stable-brightgreen.svg?style=for-the-badge" alt="stable"></span></h3>
<div class="paragraph">
<p>A <em>Stable</em> RFC is one that describes a protocol which itself
is "finished", and suitable for implementation by other
implementors. Additionally, the document itself must have
been reviewed for accuracy and completeness.</p>
</div>
<div class="paragraph">
<p>As a final check, there should be at least two independent
implementations of the RFC in order to qualify for Stable
status.</p>
</div>
<div class="paragraph">
<p>The bright green badge color indicates that the document
and the protocol are suitable for broad adoption by
implementors.</p>
</div>
</div>
<div class="sect2">
<h3 id="deprecated">Deprecated <span class="image"><img src="https://img.shields.io/badge/status-deprecated-orange.svg?style=for-the-badge" alt="deprecated"></span></h3>
<div class="paragraph">
<p>A <em>Deprecated</em> RFC documents a protocol that is no longer
recommended for use by implementors. Generally, a newer
<em>Stable</em> RFC will document a newer protocol that should
be used instead.</p>
</div>
<div class="paragraph">
<p>However, deprecated protocols are expected to be found
in the wild, and implementors MAY choose to implement
them anyway for compatibility reasons.</p>
</div>
<div class="paragraph">
<p>The orange status badge color serves as a warning to
implementors that they are discouraged from
implementing this, and should look for a newer
protocol instead.</p>
</div>
</div>
<div class="sect2">
<h3 id="retired">Retired <span class="image"><img src="https://img.shields.io/badge/status-retired-red.svg?style=for-the-badge" alt="retired"></span></h3>
<div class="paragraph">
<p>A <em>Retired</em> RFC is one that has been removed from
service.</p>
</div>
<div class="paragraph">
<p>Generally these RFCs document protocols that new
implementations MUST NOT implement, and that existing
implementations SHOULD remove from service at their
earliest opportunity.</p>
</div>
<div class="paragraph">
<p>The main motivation for retiring RFCs will be to
cover the case where severe defects in an implementation
exist. For example, in the 802.11 arena, WEP would
be a protocol that should be <em>Retired</em>, as it is
defective in ways that are dangerous to the user.</p>
</div>
<div class="paragraph">
<p>An RFC may also be retired when the protocol is
believed to have become extinct in the wild.</p>
</div>
<div class="paragraph">
<p>The purpose of keeping the retired RFCs available
is for historical context. It may also help some
party in the event that they come across an actual
implementation in the wild.</p>
</div>
<div class="paragraph">
<p>The red status color should be a strong indicator
that nobody should be using RFCs with this status.</p>
</div>
</div>
</div>
</div>
</div>
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