This document is Part 2 of ISO/IEC 19776, Extensible 3D (X3D) encodings, corresponding to ISO/IEC 19975-1 X3D Architecture version 4.0 . The full title of this part of the International Standard is: Computer graphics, image processing, and environmental data representation —g Extensible 3D (X3D) —g Part 2: Classic VRML encoding.

Background	Clauses	Annexes
Foreword	1  Scope	A  Grammar
Introduction	2  Normative references	B  Examples
	3  Terms, definitions and abbreviated terms	Bibliography
	4  Concepts
	5  Encoding of fields
	6  Encoding of nodes
	7  Conformance

The Foreword provides background on the standards process for X3D encodings. The Introduction describes the purpose of X3D encodings. The following clauses define this part of ISO/IEC 19776:

1. Scope defines the technology area that the Classic VRML encoding of X3D addresses.
2. Normative references lists the normative specifications referenced in this part of ISO/IEC 19776.
3. Terms, definitions and abbreviated terms contains the glossary of terminology used in this part of ISO/IEC 19776.
4. Concepts describes fundamentals of the Classic VRML encoding of X3D.
5. Encoding of fields specifies the Classic VRML encoding of data types used by X3D fields.
6. Encoding of nodes specifies the Classic VRML encoding of X3D nodes.
7. Conformance describes the conformance requirements for implementations of the Classic VRML encoding.

The following annexes are included in the specification:

1. Grammar presents the grammar for the X3D Classic VRML file format.
2. Examples includes a variety of Classic VRML encoded example files.

Bibliography lists references providing additional information.