<?xml version='1.0' encoding='UTF-8'?>
<?xml-stylesheet type="text/xsl" href="matroska.xsl"?>
<?xml-model href="matroska.rng" schematypens="http://relaxng.org/ns/structure/1.0" ?>
<registry xmlns="http://www.iana.org/assignments" id="matroska">
  <title>Matroska</title>
  <created>2023-10-27</created>
  <updated>2025-01-14</updated>
  
  <registry id="matroska-element-ids">
    <title>Matroska Element IDs</title>
    <xref type="rfc" data="rfc9559"/>
    <range>
      <value>0x80-0xFE</value>
      <registration_rule>RFC Required</registration_rule>
    </range>
    <range>
      <value>0x407F-0x7FFE</value>
      <registration_rule>Specification Required</registration_rule>
    </range>
    <range>
      <value>0x203FFF-0x3FFFFE</value>
      <registration_rule>First Come First Served</registration_rule>
    </range>
    <range>
      <value>0x101FFFFF-0x1FFFFFFE</value>
      <registration_rule>First Come First Served</registration_rule>
    </range>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2023-10-27">
      <value>0x80</value>
      <description>ChapterDisplay</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.9</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x83</value>
      <description>TrackType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x85</value>
      <description>ChapString</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.10</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x86</value>
      <description>CodecID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.21</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x88</value>
      <description>FlagDefault</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x8E</value>
      <description>Slices</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.5</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x91</value>
      <description>ChapterTimeStart</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x92</value>
      <description>ChapterTimeEnd</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x96</value>
      <description>CueRefTime</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x97</value>
      <description>CueRefCluster</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.37</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x98</value>
      <description>ChapterFlagHidden</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x9A</value>
      <description>FlagInterlaced</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x9B</value>
      <description>BlockDuration</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x9C</value>
      <description>FlagLacing</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.12</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x9D</value>
      <description>FieldOrder</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x9F</value>
      <description>Channels</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.29.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA0</value>
      <description>BlockGroup</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA1</value>
      <description>Block</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA2</value>
      <description>BlockVirtual</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.3</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xA3</value>
      <description>SimpleBlock</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA4</value>
      <description>CodecState</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA5</value>
      <description>BlockAdditional</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.2.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA6</value>
      <description>BlockMore</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.2.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xA7</value>
      <description>Position</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xAA</value>
      <description>CodecDecodeAll</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.22</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xAB</value>
      <description>PrevSize</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xAE</value>
      <description>TrackEntry</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xAF</value>
      <description>EncryptedBlock</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.15</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xB0</value>
      <description>PixelWidth</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB2</value>
      <description>CueDuration</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB3</value>
      <description>CueTime</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB5</value>
      <description>SamplingFrequency</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.29.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB6</value>
      <description>ChapterAtom</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB7</value>
      <description>CueTrackPositions</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xB9</value>
      <description>FlagEnabled</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xBA</value>
      <description>PixelHeight</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xBB</value>
      <description>CuePoint</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xC0</value>
      <description>TrickTrackUID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.28</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC1</value>
      <description>TrickTrackSegmentUID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.29</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC4</value>
      <description>TrickMasterTrackSegmentUID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.32</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC6</value>
      <description>TrickTrackFlag</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.30</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC7</value>
      <description>TrickMasterTrackUID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.31</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC8</value>
      <description>ReferenceFrame</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.12</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xC9</value>
      <description>ReferenceOffset</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.13</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCA</value>
      <description>ReferenceTimestamp</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.14</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCB</value>
      <description>BlockAdditionID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.9</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCC</value>
      <description>LaceNumber</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.7</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCD</value>
      <description>FrameNumber</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.8</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCE</value>
      <description>Delay</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.10)</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xCF</value>
      <description>SliceDuration</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.11</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xD7</value>
      <description>TrackNumber</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xDB</value>
      <description>CueReference</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE0</value>
      <description>Video</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE1</value>
      <description>Audio</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.29</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE2</value>
      <description>TrackOperation</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE3</value>
      <description>TrackCombinePlanes</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE4</value>
      <description>TrackPlane</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE5</value>
      <description>TrackPlaneUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE6</value>
      <description>TrackPlaneType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE7</value>
      <description>Timestamp</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xE8</value>
      <description>TimeSlice</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.6</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xE9</value>
      <description>TrackJoinBlocks</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xEA</value>
      <description>CueCodecState</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xEB</value>
      <description>CueRefCodecState</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.39</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0xED</value>
      <description>TrackJoinUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xEE</value>
      <description>BlockAddID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.2.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xF0</value>
      <description>CueRelativePosition</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xF1</value>
      <description>CueClusterPosition</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xF7</value>
      <description>CueTrack</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xFA</value>
      <description>ReferencePriority</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xFB</value>
      <description>ReferenceBlock</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0xFD</value>
      <description>ReferenceVirtual</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.4</xref>)</ref>
    </record>
    <record date="2024-06-07">
      <value>0xFF</value>
      <description>Reserved</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559"/></ref>
    </record>
    <record date="2024-06-18">
      <value>0x0100-0x407E</value>
      <description>Not valid for use as an Element ID</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 27.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x41A4</value>
      <description>BlockAddIDName</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.17.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x41E4</value>
      <description>BlockAdditionMapping</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.17</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x41E7</value>
      <description>BlockAddIDType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.17.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x41ED</value>
      <description>BlockAddIDExtraData</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.17.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x41F0</value>
      <description>BlockAddIDValue</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.17.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4254</value>
      <description>ContentCompAlgo</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4255</value>
      <description>ContentCompSettings</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x437C</value>
      <description>ChapLanguage</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.11</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x437D</value>
      <description>ChapLanguageBCP47</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.12</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x437E</value>
      <description>ChapCountry</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.13</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4444</value>
      <description>SegmentFamily</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4461</value>
      <description>DateUTC</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.11</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x447A</value>
      <description>TagLanguage</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x447B</value>
      <description>TagLanguageBCP47</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4484</value>
      <description>TagDefault</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4485</value>
      <description>TagBinary</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4487</value>
      <description>TagString</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4489</value>
      <description>Duration</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.10</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x44B4</value>
      <description>TagDefaultBogus</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.43</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x450D</value>
      <description>ChapProcessPrivate</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.16</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x45A3</value>
      <description>TagName</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x45B9</value>
      <description>EditionEntry</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x45BC</value>
      <description>EditionUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x45DB</value>
      <description>EditionFlagDefault</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x45DD</value>
      <description>EditionFlagOrdered</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x465C</value>
      <description>FileData</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4660</value>
      <description>FileMediaType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4661</value>
      <description>FileUsedStartTime</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.41</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x4662</value>
      <description>FileUsedEndTime</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.42</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x466E</value>
      <description>FileName</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4675</value>
      <description>FileReferral</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.40</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x467E</value>
      <description>FileDescription</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x46AE</value>
      <description>FileUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E1</value>
      <description>ContentEncAlgo</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E2</value>
      <description>ContentEncKeyID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.10</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E3</value>
      <description>ContentSignature</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.33</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E4</value>
      <description>ContentSigKeyID</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.34</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E5</value>
      <description>ContentSigAlgo</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.35</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E6</value>
      <description>ContentSigHashAlgo</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.36</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E7</value>
      <description>ContentEncAESSettings</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.11</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x47E8</value>
      <description>AESSettingsCipherMode</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.12</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4D80</value>
      <description>MuxingApp</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.13</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x4DBB</value>
      <description>Seek</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5031</value>
      <description>ContentEncodingOrder</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5032</value>
      <description>ContentEncodingScope</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5033</value>
      <description>ContentEncodingType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5034</value>
      <description>ContentCompression</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5035</value>
      <description>ContentEncryption</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x535F</value>
      <description>CueRefNumber</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.38</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x536E</value>
      <description>Name</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.18</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5378</value>
      <description>CueBlockNumber</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5.1.2.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x537F</value>
      <description>TrackOffset</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.18</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x53AB</value>
      <description>SeekID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.1.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x53AC</value>
      <description>SeekPosition</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.1.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x53B8</value>
      <description>StereoMode</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x53B9</value>
      <description>OldStereoMode</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x53C0</value>
      <description>AlphaMode</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54AA</value>
      <description>PixelCropBottom</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54B0</value>
      <description>DisplayWidth</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.12</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54B2</value>
      <description>DisplayUnit</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54B3</value>
      <description>AspectRatioType</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.24</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x54BA</value>
      <description>DisplayHeight</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.13</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54BB</value>
      <description>PixelCropTop</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.9</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54CC</value>
      <description>PixelCropLeft</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.10</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x54DD</value>
      <description>PixelCropRight</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.11</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AA</value>
      <description>FlagForced</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AB</value>
      <description>FlagHearingImpaired</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AC</value>
      <description>FlagVisualImpaired</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AD</value>
      <description>FlagTextDescriptions</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.9</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AE</value>
      <description>FlagOriginal</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.10</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55AF</value>
      <description>FlagCommentary</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.11</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B0</value>
      <description>Colour</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.16</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B1</value>
      <description>MatrixCoefficients</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.17</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B2</value>
      <description>BitsPerChannel</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.18</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B3</value>
      <description>ChromaSubsamplingHorz</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.19</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B4</value>
      <description>ChromaSubsamplingVert</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.20</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B5</value>
      <description>CbSubsamplingHorz</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.21</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B6</value>
      <description>CbSubsamplingVert</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.22</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B7</value>
      <description>ChromaSitingHorz</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.23</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B8</value>
      <description>ChromaSitingVert</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.24</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55B9</value>
      <description>Range</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.25</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55BA</value>
      <description>TransferCharacteristics</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.26</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55BB</value>
      <description>Primaries</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.27</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55BC</value>
      <description>MaxCLL</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.28</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55BD</value>
      <description>MaxFALL</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.29</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D0</value>
      <description>MasteringMetadata</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.30</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D1</value>
      <description>PrimaryRChromaticityX</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.31</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D2</value>
      <description>PrimaryRChromaticityY</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.32</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D3</value>
      <description>PrimaryGChromaticityX</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.33</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D4</value>
      <description>PrimaryGChromaticityY</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.34</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D5</value>
      <description>PrimaryBChromaticityX</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.35</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D6</value>
      <description>PrimaryBChromaticityY</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.36</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D7</value>
      <description>WhitePointChromaticityX</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.37</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D8</value>
      <description>WhitePointChromaticityY</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.38</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55D9</value>
      <description>LuminanceMax</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.39</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55DA</value>
      <description>LuminanceMin</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.40</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x55EE</value>
      <description>MaxBlockAdditionID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.16</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5654</value>
      <description>ChapterStringUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x56AA</value>
      <description>CodecDelay</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.25</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x56BB</value>
      <description>SeekPreRoll</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.26</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5741</value>
      <description>WritingApp</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.14</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x5854</value>
      <description>SilentTracks</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.1</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x58D7</value>
      <description>SilentTrackNumber</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.2</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x61A7</value>
      <description>AttachedFile</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6240</value>
      <description>ContentEncoding</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6264</value>
      <description>BitDepth</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.29.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63A2</value>
      <description>CodecPrivate</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.22</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C0</value>
      <description>Targets</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C3</value>
      <description>ChapterPhysicalEquiv</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C4</value>
      <description>TagChapterUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C5</value>
      <description>TagTrackUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C6</value>
      <description>TagAttachmentUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63C9</value>
      <description>TagEditionUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x63CA</value>
      <description>TargetType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6624</value>
      <description>TrackTranslate</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.27</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x66A5</value>
      <description>TrackTranslateTrackID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.27.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x66BF</value>
      <description>TrackTranslateCodec</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.27.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x66FC</value>
      <description>TrackTranslateEditionUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.27.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x67C8</value>
      <description>SimpleTag</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x68CA</value>
      <description>TargetTypeValue</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6911</value>
      <description>ChapProcessCommand</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.17</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6922</value>
      <description>ChapProcessTime</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.18</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6924</value>
      <description>ChapterTranslate</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6933</value>
      <description>ChapProcessData</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.19</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6944</value>
      <description>ChapProcess</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.14</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6955</value>
      <description>ChapProcessCodecID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.15</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x69A5</value>
      <description>ChapterTranslateID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.8.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x69BF</value>
      <description>ChapterTranslateCodec</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.8.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x69FC</value>
      <description>ChapterTranslateEditionUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.8.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6D80</value>
      <description>ContentEncodings</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6DE7</value>
      <description>MinCache</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.16</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x6DF8</value>
      <description>MaxCache</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.17</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x6E67</value>
      <description>ChapterSegmentUUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6EBC</value>
      <description>ChapterSegmentEditionUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x6FAB</value>
      <description>TrackOverlay</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.23</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x7373</value>
      <description>Tag</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7384</value>
      <description>SegmentFilename</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x73A4</value>
      <description>SegmentUUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x73C4</value>
      <description>ChapterUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x73C5</value>
      <description>TrackUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7446</value>
      <description>AttachmentLink</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.24</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x75A1</value>
      <description>BlockAdditions</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x75A2</value>
      <description>DiscardPadding</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3.5.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7670</value>
      <description>Projection</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.41</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7671</value>
      <description>ProjectionType</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.42</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7672</value>
      <description>ProjectionPrivate</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.43</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7673</value>
      <description>ProjectionPoseYaw</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.44</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7674</value>
      <description>ProjectionPosePitch</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.45</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7675</value>
      <description>ProjectionPoseRoll</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.46</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x78B5</value>
      <description>OutputSamplingFrequency</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.29.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7BA9</value>
      <description>Title</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.12</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x7D7B</value>
      <description>ChannelPositions</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.27</xref>)</ref>
    </record>
    <record date="2024-06-07">
      <value>0x7FFF</value>
      <description>Reserved</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559"/></ref>
    </record>
    <record date="2024-06-18">
      <value>0x010000-0x203FFE</value>
      <description>Not valid for use as an Element ID</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 27.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x22B59C</value>
      <description>Language</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.19</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x22B59D</value>
      <description>LanguageBCP47</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.20</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x23314F</value>
      <description>TrackTimestampScale</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.15</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x234E7A</value>
      <description>DefaultDecodedFieldDuration</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.14</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x2383E3</value>
      <description>FrameRate</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.26</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x23E383</value>
      <description>DefaultDuration</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.13</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x258688</value>
      <description>CodecName</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.23</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x26B240</value>
      <description>CodecDownloadURL</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.21</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x2AD7B1</value>
      <description>TimestampScale</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.9</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x2EB524</value>
      <description>UncompressedFourCC</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.15</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x2FB523</value>
      <description>GammaValue</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.25</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x3A9697</value>
      <description>CodecSettings</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.19</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x3B4040</value>
      <description>CodecInfoURL</description>
      <controller>IETF</controller>
      <ref>Reclaimed (<xref type="rfc" data="rfc9559">RFC9559, Appendix A.20</xref>)</ref>
    </record>
    <record date="2023-10-27">
      <value>0x3C83AB</value>
      <description>PrevFilename</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x3CB923</value>
      <description>PrevUUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.3</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x3E83BB</value>
      <description>NextFilename</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x3EB923</value>
      <description>NextUUID</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2.5</xref></ref>
    </record>
    <record date="2024-06-07">
      <value>0x3FFFFF</value>
      <description>Reserved</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559"/></ref>
    </record>
    <record date="2024-06-18">
      <value>0x01000000-0x101FFFFE</value>
      <description>Not valid for use as an Element ID</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 27.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1043A770</value>
      <description>Chapters</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x114D9B74</value>
      <description>SeekHead</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1254C367</value>
      <description>Tags</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1549A966</value>
      <description>Info</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.2</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1654AE6B</value>
      <description>Tracks</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x18538067</value>
      <description>Segment</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1941A469</value>
      <description>Attachments</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.6</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1C53BB6B</value>
      <description>Cues</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.5</xref></ref>
    </record>
    <record date="2023-10-27">
      <value>0x1F43B675</value>
      <description>Cluster</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.3</xref></ref>
    </record>
    <record date="2024-06-07">
      <value>0x1FFFFFFF</value>
      <description>Reserved</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559"/></ref>
    </record>
  </registry>
  
     

  <registry id="matroska-compression-algorithms">
    <title>Matroska Compression Algorithms</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>zlib</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.6</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>bzlib</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.6</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>lzo1x</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.6</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>Header Stripping</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.6</xref></ref>
    </record>
    <record>
      <value>4-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>
  </registry>

  

  <registry id="matroska-encryption-algorithms">
    <title>Matroska Encryption Algorithms</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>Not encrypted</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>DES</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>3DES</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>Twofish</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>4</value>
      <description>Blowfish</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>5</value>
      <description>AES</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.9</xref></ref>
    </record>
    <record>
      <value>6-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>
  </registry>

  

  <registry id="matroska-aes-cipher-modes">
    <title>Matroska AES Cipher Modes</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>Not valid for use as an AES Cipher Mode</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.12</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>AES-CTR</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.12</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>AES-CBC</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.12</xref></ref>
    </record>
    <record>
      <value>3-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>
  </registry>

  

  <registry id="matroska-content-encoding-scopes">
    <title>Matroska Content Encoding Scopes</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0x0</value>
      <description>Not valid for use as a Content Encoding Scope</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>0x1</value>
      <description>Block</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>0x2</value>
      <description>Private</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>0x4</value>
      <description>Next</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.3</xref></ref>
    </record>
    <record>
      <value>0x8-0x8000000000000000</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

  

  <registry id="matroska-content-encoding-types">
    <title>Matroska Content Encoding Types</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>Compression</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.4</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>Encryption</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.31.4</xref></ref>
    </record>
    <record>
      <value>2-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>
  </registry>

  

  <registry id="matroska-stereo-modes">
    <title>Matroska Stereo Modes</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>mono</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>side by side (left eye first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>top - bottom (right eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>top - bottom (left eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>4</value>
      <description>checkboard (right eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>5</value>
      <description>checkboard (left eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>6</value>
      <description>row interleaved (right eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>7</value>
      <description>row interleaved (left eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>8</value>
      <description>column interleaved (right eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>9</value>
      <description>column interleaved (left eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>10</value>
      <description>anaglyph (cyan/red)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>11</value>
      <description>side by side (right eye first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>12</value>
      <description>anaglyph (green/magenta)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>13</value>
      <description>both eyes laced in one Block (left eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>14</value>
      <description>both eyes laced in one Block (right eye is first)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.3</xref></ref>
    </record>
    <record>
      <value>15-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

   

  <registry id="matroska-alpha-modes">
    <title>Matroska Alpha Modes</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>none</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.4</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>present</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.4</xref></ref>
    </record>
    <record>
      <value>2-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

   

  <registry id="matroska-display-units">
    <title>Matroska Display Units</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>pixels</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>centimeters</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>inches</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>display aspect ratio</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>4</value>
      <description>unknown</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.14</xref></ref>
    </record>
    <record>
      <value>5-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

   

  <registry id="matroska-horizontal-chroma-sitings">
    <title>Matroska Horizontal Chroma Sitings</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>unspecified</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.23</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>left collocated</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.23</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>half</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.23</xref></ref>
    </record>
    <record>
      <value>3-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

   

  <registry id="matroska-vertical-chroma-sitings">
    <title>Matroska Vertical Chroma Sitings</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>unspecified</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.24</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>top collocated</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.24</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>half</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.24</xref></ref>
    </record>
    <record>
      <value>3-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

  

  <registry id="matroska-color-ranges">
    <title>Matroska Color Ranges</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>unspecified</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.25</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>broadcast range</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.25</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>full range (no clipping)</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.25</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>defined by MatrixCoefficients / TransferCharacteristics</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.25</xref></ref>
    </record>
    <record>
      <value>4-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

  

  <registry id="matroska-tags-target-types">
    <title>Matroska Tags Target Types</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>Not valid for use as a Tags Target Type</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>1-9</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>10</value>
      <description>SHOT</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>11-19</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record>
      <value>20</value>
      <description>SUBTRACK / MOVEMENT / SCENE</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>21-29</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record>
      <value>30</value>
      <description>TRACK / SONG / CHAPTER</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>31-39</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>40</value>
      <description>PART / SESSION</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>41-49</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>50</value>
      <description>ALBUM / OPERA / CONCERT / MOVIE / EPISODE</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>51-59</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>60</value>
      <description>EDITION / ISSUE / VOLUME / OPUS / SEASON / SEQUEL</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>61-69</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>70</value>
      <description>COLLECTION</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.8.1.1.1</xref></ref>
    </record>
    <record>
      <value>71-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record> 
  </registry>

   

  <registry id="matroska-chapter-codec-ids">
    <title>Matroska Chapter Codec IDs</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2023-10-27" updated="2024-09-26">
      <value>0</value>
      <description>Matroska Script</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.15</xref></ref>
    </record>
    <record date="2023-10-27" updated="2024-09-26">
      <value>1</value>
      <description>DVD-menu</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.7.1.4.15</xref></ref>
    </record>
    <record>
      <value>2-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
      <ref/>
    </record>
  </registry>

  

  <registry id="matroska-projection-types">
    <title>Matroska Projection Types</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>rectangular</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.42</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>equirectangular</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.42</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>cubemap</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.42</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>mesh</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.28.42</xref></ref>
    </record>
    <record>
      <value>4-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>
  </registry>
  
  

  <registry id="matroska-track-types">
    <title>Matroska Track Types</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>Specification Required</registration_rule>
    <expert>Dave Rice, Steve Lhomme</expert>
    <record date="2024-09-26">
      <value>0</value>
      <description>Not valid for use as a Track Type</description>
      <controller/>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>video</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>audio</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>3</value>
      <description>complex</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record>
      <value>4-15</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>16</value>
      <description>logo</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>17</value>
      <description>subtitle</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>18</value>
      <description>buttons</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record>
      <value>19-31</value>
      <description>Unassigned</description>
      <controller/>
    </record>
    <record date="2024-09-26">
      <value>32</value>
      <description>control</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>33</value>
      <description>metadata</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.3</xref></ref>
    </record>
    <record>
      <value>34-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

  

  <registry id="matroska-track-plane-types">
    <title>Matroska Track Plane Types</title>
    <xref type="rfc" data="rfc9559"/>
    <registration_rule>First Come First Served</registration_rule>
    <record date="2024-09-26">
      <value>0</value>
      <description>left eye</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.4</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>1</value>
      <description>right eye</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.4</xref></ref>
    </record>
    <record date="2024-09-26">
      <value>2</value>
      <description>background</description>
      <controller>IETF</controller>
      <ref><xref type="rfc" data="rfc9559">RFC9559, Section 5.1.4.1.30.4</xref></ref>
    </record>
    <record>
      <value>3-18446744073709551615</value>
      <description>Unassigned</description>
      <controller/>
    </record>    
  </registry>

  <people/>
</registry>
