ISO/IEC 23415:2024

International
Standard
ISO/IEC 23415
First edition
Information technology — Data
2024-03
Format Description Language
(DFDL) v1.0 Specification
PROOF/ÉPREUVE
Reference number
ISO/IEC 23415:2024(en) © ISO/IEC 2024

---------------------- Page: 1 ----------------------
ISO/IEC 23415:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO/IEC 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO/IEC 23415:2024(en)

Contents
Data Format Description Language (DFDL) v1.0 Specification . 1
1 Introduction . 9
1.1 Why is DFDL Needed?. 10
1.2 What is DFDL?. 10
Simple Example . 10
1.3 What DFDL is not . 13
1.4 Scope of version 1.0 . 13
2 Overview of the Specification . 15
3 Notational and Definitional Conventions . 16
3.1 Glossary and Terminology. 16
3.2 Failure Types . 16
4 The DFDL Information Set (Infoset) . 17
4.1 "No Value'' . 18
4.2 Information Items . 18
Document Information Item . 18
Element Information Items . 18
4.3 DFDL Information Item Order . 19
4.4 DFDL Augmented Infoset . 19
5 DFDL Schema Component Model . 20
5.1 DFDL Simple Types . 20
5.2 DFDL Subset of XML Schema. 21
5.3 XSD Facets, min/maxOccurs, default, and fixed . 22
MinOccurs, MaxOccurs . 23
MinLength, MaxLength . 23
MaxInclusive, MaxExclusive, MinExclusive, MinInclusive, TotalDigits, FractionDigits23
Pattern . 23
Enumeration Values . 23
Default . 23
Fixed . 24
5.4 Compatibility with Other Annotation Language Schemas . 24
6 DFDL Syntax Basics . 25
6.1 Namespaces .
...