Information technologies - JPEG systems - Part 7: JPEG linked media format (JLINK) - Amendment 1: Revision to the JLINK XMP expressions

Technologies de l'Information — Systèmes JPEG — Partie 7: Format de media de liaison JPEG (JLINK) — Amendement 1: Titre manque

General Information

Status
Published
Publication Date
07-Jan-2025
Current Stage
6060 - International Standard published
Start Date
08-Jan-2025
Due Date
19-Jul-2025
Completion Date
08-Jan-2025

Relations

Effective Date
27-Jan-2024

Overview

ISO/IEC 19566-7:2022/Amd 1:2025 is an important international amendment to the JPEG systems standard specifically focused on the JPEG Linked Media Format (JLINK). This amendment revises the JLINK XMP expressions, enhancing the metadata framework used in JPEG linked media. Developed collaboratively by ISO and IEC, this update addresses semantic and structural improvements to ensure better interoperability and extensibility for JLINK implementations.

Key Topics

  • Revision of XMP Expressions: The amendment introduces updates to the XML Metadata Platform (XMP) used in JLINK files. Notably, the Version data type within the XMP schema is changed from integer to string, reflecting a more flexible and precise metadata typing.

  • Enhanced Metadata Structure: The updated XMP expressions provide clearer schema descriptors, supporting complex metadata constructs related to scenes, viewports, images, and links within the JLINK standard. This allows richer descriptions and better referencing inside linked media content.

  • Improved Scene and Viewport Descriptors: The amendment details refined definitions for viewport properties such as coordinates (X, Y), field of view parameters (XFOV, YFOV), and identifiers. These descriptors help in accurately locating and defining interactive regions in multimedia scenes.

  • Link and Region Metadata Enhancements: The amendment defines precise descriptors for embedding link regions including geometric parameters (Shape, X, Y, W, H, Rotation), duration, and sprite references. This allows for advanced interactive media applications where regions in an image link to other media or metadata content.

Applications

  • Multimedia Content Linking: This standard is critical for developers and content creators working with interactive JPEG-based media, enabling the embedding of sophisticated metadata and links inside media.

  • Digital Asset Management: Enhanced XMP metadata expressions improve cataloging, searching, and interoperability of linked media assets in professional environments.

  • Augmented and Virtual Reality: Accurate viewport and region metadata supports immersive applications where spatial relationships within media are essential.

  • Web and Mobile Platforms: The updated standard facilitates richer user experiences on various platforms by supporting detailed media metadata and interactivity encoded directly in JPEG files.

  • Content Archiving: Well-structured and standardized metadata ensures long-term accessibility and preservation of linked media assets.

Related Standards

  • ISO/IEC 19566 Series: The broader JPEG Systems family of standards, covering various aspects of JPEG media, including Part 1 for core JPEG imaging, and other parts addressing container formats and embedded metadata.

  • XMP Specification (Adobe): The Adobe XMP Core specification, which underpins the metadata models used in the JLINK amendment.

  • ISO/IEC JTC 1/SC 29: The Joint Technical Committee responsible for multimedia coding standards, which oversees the development and maintenance of JPEG and related standards.

Practical Benefits

  • Metadata Consistency: By formalizing and revising XMP expressions, the amendment improves consistency across implementations, reducing errors and increasing interoperability.

  • Flexible Versioning: Changing the Version field to a string allows more nuanced version identifiers, facilitating backward and forward compatibility.

  • Interoperable Linked Media: Clear definitions for Scene, Viewport, and Link schemas enable robust implementations that can be widely adopted in multimedia applications.

  • Standardized Interactive Media: Organizations can create interactive JPEG media with confidence that metadata will be understood correctly across systems.


Stay compliant and up-to-date with ISO/IEC 19566-7:2022/Amd 1:2025 to leverage advanced linked media features in your JPEG systems. For detailed technical implementation, consult the full amendment document and related ISO resources.

Standard

ISO/IEC 19566-7:2022/Amd 1:2025 - Information technologies — JPEG systems — Part 7: JPEG linked media format (JLINK) — Amendment 1: Revision to the JLINK XMP expressions Released:8. 01. 2025

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Frequently Asked Questions

ISO/IEC 19566-7:2022/Amd 1:2025 is a standard published by the International Organization for Standardization (ISO). Its full title is "Information technologies - JPEG systems - Part 7: JPEG linked media format (JLINK) - Amendment 1: Revision to the JLINK XMP expressions". This standard covers: Information technologies - JPEG systems - Part 7: JPEG linked media format (JLINK) - Amendment 1: Revision to the JLINK XMP expressions

Information technologies - JPEG systems - Part 7: JPEG linked media format (JLINK) - Amendment 1: Revision to the JLINK XMP expressions

ISO/IEC 19566-7:2022/Amd 1:2025 is classified under the following ICS (International Classification for Standards) categories: 35.040.30 - Coding of graphical and photographical information. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO/IEC 19566-7:2022/Amd 1:2025 has the following relationships with other standards: It is inter standard links to ISO/IEC 19566-7:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO/IEC 19566-7:2022/Amd 1:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


International
Standard
ISO/IEC 19566-7
First edition
Information technologies — JPEG
2022-10
systems —
AMENDMENT 1
Part 7:
2025-01
JPEG linked media format (JLINK)
AMENDMENT 1: Revision to the JLINK
XMP expressions
Reference number
ISO/IEC 19566-7:2022/Amd. 1:2025(en) © ISO/IEC 2025

ISO/IEC 19566-7:2022/Amd. 1:2025(en)
© ISO/IEC 2025
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
© ISO/IEC 2025 – All rights reserved
ii
ISO/IEC 19566-7:2022/Amd. 1:2025(en)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
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The procedures used to develop this document and those intended for its further maintenance are described
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of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/
IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
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received notice of (a) patent(s) which may be required to implement this document. However, implementers
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In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information.
A list of all parts in the ISO/IEC 19566 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.

© ISO/IEC 2025 – All rights reserved
iii
ISO/IEC 19566-7:2022/Amd. 1:2025(en)
Information technologies — JPEG systems —
Part 7:
JPEG linked media format (JLINK)
AMENDMENT 1: Revision to the JLINK XMP expressions

B.4, Table B.4
In the column “Data type”, replace the value “integer” for “Version” with the value “string”.

B.4, Table B.4
In the column “Schema descriptor”, replace the value “integer” for “Version” with
the value “string”.

Subclause B.6
Replace the XMP fragment with the following:
xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 5.5.0">
xmlns:rdf="https://www.w3.org/1999/02/22-rdf-syntax-ns#">
xmlns:xmp="http://ns.adobe.com/xap/1.0/"
xmlns:umf="http://ns.intel.com/umf/2.0">
0




Scene



Version
string


Title
string


Note
string


Viewport



X
real
© ISO/IEC 2025 – All rights reserved
ISO/IEC 19566-7:2022/Amd. 1:2025(en)


Y
real


XFOV
real


YFOV
real


ID
integer





Image



Format
string


Href
string








Link



Region



Shape
string


X
real


Y
real


W
real


H
real


Rotation
real



© ISO/IEC 2025 – All rights reserved
ISO/IEC 19566-7:2022/Amd. 1:2025(en)


Duration
integer


VPID
integer


Sprite
string


To
string









Subclause B.7
Replace the XMP fragment with the following:
xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 5.5.0">
xmlns:rdf="https://www.w3.org/1999/02/22-rdf-syntax-ns#">
xmlns:xmp="http://ns.adobe.com/xap/1.0/"
xmlns:umf="http://ns.intel.com/umf/2.0">
0



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