<?xml version='1.0' encoding='UTF-8'?>
<?xml-stylesheet type="text/xsl" href="version-numbers.xsl"?>
<?oxygen RNGSchema="version-numbers.rng" type="xml"?>
<registry xmlns="http://www.iana.org/assignments" id="version-numbers">
  <title>Version Numbers</title>
  <updated>2007-06-27</updated>
  <note>In the Internet Protocol (IP) <xref type="rfc" data="rfc791"/> there is a field to identify
the version of the internetwork general protocol.  This field is 4
bits in size.</note>
  <registry id="version-numbers-1">
    <title>IP Version Numbers</title>
    <xref type="rfc" data="rfc2780"/>
    <registration_rule>IETF Standards Action</registration_rule>
    <record>
      <value>0-1</value>
      <version>Reserved</version>
      <xref type="person" data="Jon_Postel"/>
      <xref type="rfc" data="rfc4928"/>
    </record>
    <record>
      <value>2-3</value>
      <version>Unassigned</version>
      <xref type="person" data="Jon_Postel"/>
    </record>
    <record>
      <value>4</value>
      <keyword>IP</keyword>
      <version>Internet Protocol</version>
      <xref type="rfc" data="rfc791"/>
      <xref type="person" data="Jon_Postel"/>
    </record>
    <record>
      <value>5</value>
      <keyword>ST</keyword>
      <version>ST Datagram Mode</version>
      <xref type="rfc" data="rfc1190"/>
      <xref type="person" data="Jim_Forgie"/>
    </record>
    <record>
      <value>6</value>
      <keyword>IPv6</keyword>
      <version>Internet Protocol version 6</version>
      <xref type="rfc" data="rfc1752"/>
    </record>
    <record>
      <value>7</value>
      <keyword>TP/IX</keyword>
      <version>TP/IX: The Next Internet</version>
      <xref type="rfc" data="rfc1475"/>
    </record>
    <record>
      <value>8</value>
      <keyword>PIP</keyword>
      <version>The P Internet Protocol</version>
      <xref type="rfc" data="rfc1621"/>
    </record>
    <record>
      <value>9</value>
      <keyword>TUBA</keyword>
      <version>TUBA</version>
      <xref type="rfc" data="rfc1347"/>
    </record>
    <record>
      <value>10-14</value>
      <version>Unassigned</version>
      <xref type="person" data="Jon_Postel"/>
    </record>
    <record>
      <value>15</value>
      <version>Reserved</version>
      <xref type="person" data="Jon_Postel"/>
    </record>
  </registry>
  <people>
    <person id="Jim_Forgie">
      <name>Jim Forgie</name>
      <uri>mailto:FORGIE&amp;xn.ll.mit.ed</uri>
    </person>
    <person id="Jon_Postel">
      <name>Jon Postel</name>
      <uri>mailto:postel&amp;isi.edu</uri>
    </person>
  </people>
</registry>
