Extensible Binary Meta Language
draft-ietf-cellar-ebml-00

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Document Type Active Internet-Draft (cellar WG)
Authors Steve <> , Dave <> , Moritz <>
Last updated 2016-09-23
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cellar                                                         S. Lhomme
Internet-Draft
Intended status: Standards Track                                 D. Rice
Expires: March 27, 2017
                                                               M. Bunkus
                                                      September 23, 2016

                    Extensible Binary Meta Language
                       draft-ietf-cellar-ebml-00

Abstract

   This document defines the Extensible Binary Meta Language (EBML)
   format as a genearlized file format for any type of data in a
   hierarchical form.  EBML is designed as a binary equivalent to XML
   and utilizes a storage-efficient approach to building 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 an EBML Schema to convey the semantics of an EBML Document.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on March 27, 2017.

Copyright Notice

   Copyright (c) 2016 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
   (http://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

Lhomme, et al.           Expires March 27, 2017                 [Page 1]
Internet-Draft                    EBML                    September 2016

   to this document.  Code Components 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.  EBML specifications . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Introduction  . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  Notation and Conventions  . . . . . . . . . . . . . . . .   3
     1.3.  Security Considerations . . . . . . . . . . . . . . . . .   3
     1.4.  Structure . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.5.  Variable Size Integer . . . . . . . . . . . . . . . . . .   4
       1.5.1.  VINT_WIDTH  . . . . . . . . . . . . . . . . . . . . .   4
       1.5.2.  VINT_MARKER . . . . . . . . . . . . . . . . . . . . .   4
       1.5.3.  VINT_DATA . . . . . . . . . . . . . . . . . . . . . .   4
       1.5.4.  VINT Examples . . . . . . . . . . . . . . . . . . . .   5
     1.6.  Element ID  . . . . . . . . . . . . . . . . . . . . . . .   5
     1.7.  Element Data Size . . . . . . . . . . . . . . . . . . . .   6
     1.8.  EBML Element Types  . . . . . . . . . . . . . . . . . . .   8
     1.9.  EBML Document . . . . . . . . . . . . . . . . . . . . . .  11
       1.9.1.  EBML Header . . . . . . . . . . . . . . . . . . . . .  12
       1.9.2.  EBML Body . . . . . . . . . . . . . . . . . . . . . .  12
     1.10. EBML Stream . . . . . . . . . . . . . . . . . . . . . . .  13
     1.11. Elements semantic . . . . . . . . . . . . . . . . . . . .  13
       1.11.1.  EBML Schema  . . . . . . . . . . . . . . . . . . . .  13
       1.11.2.  EBML Header Elements . . . . . . . . . . . . . . . .  22
       1.11.3.  Global elements (used everywhere in the format)  . .  25
     2.1.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  27
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  27

1.  EBML specifications

1.1.  Introduction

   EBML, short for Extensible Binary Meta Language, specifies a binary
   and octet (byte) aligned format inspired by the principle of XML.

   The goal of the EBML Specification is to define a generic, binary,
   space-efficient format that may be utilized to define more complex
   formats (such as containers for multimedia content) using an EBML
   Schema.  The definition of the EBML format recognizes the idea behind
   HTML and XML as a good one: separate structure and semantics allowing
   the same structural layer to be used with multiple, possibly widely
   differing semantic layers.  Except for the EBML Header and a few
   global elements this specification does not define particular EBML
   format semantics; however this specification is intended to define
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