Extensible Binary Meta Language
draft-ietf-cellar-ebml-00
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Active Internet-Draft (cellar WG)
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Steve <>
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Dave <>
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Moritz <>
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2016-09-23
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Internent Engineering Task Force (IETF)
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WG Document
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Jun 2019 - Submit specification...
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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
provisions of BCP 78 and BCP 79.
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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
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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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