Extensible Binary Meta Language
draft-ietf-cellar-ebml-17

Document Type Active Internet-Draft (cellar WG)
Last updated 2020-06-12 (latest revision 2020-01-27)
Replaces draft-lhomme-cellar-ebml
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Jun 2019 - Submit specification... )
Document shepherd Steven Villereal
Shepherd write-up Show (last changed 2018-12-04)
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Responsible AD Alexey Melnikov
Send notices to Steven Villereal <villereal@gmail.com>
IANA IANA review state Version Changed - Review Needed
RFC Editor RFC Editor state AUTH48
cellar                                                         S. Lhomme
Internet-Draft                                                          
Intended status: Standards Track                                 D. Rice
Expires: 30 July 2020                                                   
                                                               M. Bunkus
                                                         27 January 2020

                    Extensible Binary Meta Language
                       draft-ietf-cellar-ebml-17

Abstract

   This document defines the Extensible Binary Meta Language (EBML)
   format as a binary container format designed for audio/video storage.
   EBML is designed as a binary equivalent to XML and uses a storage-
   efficient approach to build nested Elements with identifiers,
   lengths, and values.  Similar to how an XML Schema defines the
   structure and semantics of an XML Document, this document defines how
   EBML Schemas are created to convey the semantics of an EBML Document.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on 30 July 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components

Lhomme, et al.            Expires 30 July 2020                  [Page 1]
Internet-Draft                    EBML                      January 2020

   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Notation and Conventions  . . . . . . . . . . . . . . . . . .   4
   3.  Structure . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Variable Size Integer . . . . . . . . . . . . . . . . . . . .   7
     4.1.  VINT_WIDTH  . . . . . . . . . . . . . . . . . . . . . . .   7
     4.2.  VINT_MARKER . . . . . . . . . . . . . . . . . . . . . . .   7
     4.3.  VINT_DATA . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.4.  VINT Examples . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Element ID  . . . . . . . . . . . . . . . . . . . . . . . . .   9
   6.  Element Data Size . . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Data Size Format  . . . . . . . . . . . . . . . . . . . .  11
     6.2.  Unknown Data Size . . . . . . . . . . . . . . . . . . . .  12
     6.3.  Data Size Values  . . . . . . . . . . . . . . . . . . . .  14
   7.  EBML Element Types  . . . . . . . . . . . . . . . . . . . . .  15
     7.1.  Signed Integer Element  . . . . . . . . . . . . . . . . .  15
     7.2.  Unsigned Integer Element  . . . . . . . . . . . . . . . .  16
     7.3.  Float Element . . . . . . . . . . . . . . . . . . . . . .  16
     7.4.  String Element  . . . . . . . . . . . . . . . . . . . . .  16
     7.5.  UTF-8 Element . . . . . . . . . . . . . . . . . . . . . .  16
     7.6.  Date Element  . . . . . . . . . . . . . . . . . . . . . .  17
     7.7.  Master Element  . . . . . . . . . . . . . . . . . . . . .  17
     7.8.  Binary Element  . . . . . . . . . . . . . . . . . . . . .  17
   8.  EBML Document . . . . . . . . . . . . . . . . . . . . . . . .  18
     8.1.  EBML Header . . . . . . . . . . . . . . . . . . . . . . .  18
     8.2.  EBML Body . . . . . . . . . . . . . . . . . . . . . . . .  18
   9.  EBML Stream . . . . . . . . . . . . . . . . . . . . . . . . .  19
   10. EBML Versioning . . . . . . . . . . . . . . . . . . . . . . .  19
     10.1.  EBML Header Version  . . . . . . . . . . . . . . . . . .  19
     10.2.  EBML Document Version  . . . . . . . . . . . . . . . . .  19
   11. Elements semantic . . . . . . . . . . . . . . . . . . . . . .  19
     11.1.  EBML Schema  . . . . . . . . . . . . . . . . . . . . . .  19
       11.1.1.  EBML Schema Example  . . . . . . . . . . . . . . . .  20
       11.1.2.  <EBMLSchema> Element . . . . . . . . . . . . . . . .  21
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