ISO 23504-1:2020
(Main)Document management applications — Raster image transport and storage — Part 1: Use of ISO 32000 (PDF/R-1)
Document management applications — Raster image transport and storage — Part 1: Use of ISO 32000 (PDF/R-1)
This document defines a subset of ISO 32000 suitable for storage, transport and exchange of multi-page raster-image documents, including but not limited to scanned documents. Bitonal, grayscale and RGB images are supported. Compression options for image data streams include JPEG, CCITT Group 4 Fax and uncompressed.
Applications de gestion de documents — Transport et stockage des images tramées — Partie 1: Utilisation de l'ISO 32000 (PDF/R-1)
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 23504-1
First edition
2020-07
Corrected version
2020-09
Document management
applications — Raster image transport
and storage —
Part 1:
Use of ISO 32000 (PDF/R-1)
Applications de gestion de documents — Transport et stockage des
images tramées —
Partie 1: Utilisation de l'ISO 32000 (PDF/R-1)
Reference number
©
ISO 2020
© ISO 2020
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
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Published in Switzerland
ii © ISO 2020 – All rights reserved
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Notation . 2
5 Version identification . 2
6 Conformity requirements . 3
6.1 General . 3
6.2 PDF subset . 3
6.2.1 General. 3
6.2.2 Unencrypted PDF/R files . 3
6.2.3 Encrypted PDF/R files. 3
6.2.4 Unencrypted and encrypted PDF/R files . 4
6.3 Catalog dictionary . 4
6.4 Metadata . 4
6.4.1 General. 4
6.4.2 Document level and page level metadata streams . 4
6.4.3 Document information dictionary . 5
6.4.4 XMP Metadata . 5
6.5 Page objects . 5
6.5.1 General. 5
6.5.2 Page tree nodes . 5
6.5.3 Media box . 5
6.5.4 Annots array and digital signatures . 6
6.5.5 Resources dictionary . 6
6.5.6 Rotation . 6
6.5.7 Content stream . 6
6.6 Strips . 7
6.6.1 General. 7
6.6.2 Bitonal images . 7
6.6.3 Grayscale images . . 8
6.6.4 RGB images . 8
6.7 Incremental updates . 9
6.8 Encryption . 9
Annex A (informative) Application notes .10
Bibliography .16
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see
www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 171, Document management applications,
Subcommittee SC 2, Document file formats, EDMS systems and authenticity of information.
This corrected version of ISO 23504-1:2020 incorporates the following corrections:
— Angled brackets inserted around 'total height' in the numerator of the second formula in A.4;
— ']' added to the line before '/Whitepoint' in A.8.
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.
iv © ISO 2020 – All rights reserved
Introduction
This document describes PDF/R (Raster), a strict subset of the PDF file format, for storing, transporting
and exchanging multi-page raster-image documents, especially scanned documents and photographs.
PDF/R provides the portability of PDF while offering the core functionality of TIFF. Bitonal, grayscale
and RGB images are supported. Compression options include JPEG, lossless CCITT Group 4 Fax and
uncompressed.
This document describes the restrictions that differentiate a PDF/R file from a standard PDF file.
Additionally, it specifies (see Clause 5) that a comment is used to identify files claiming to be PDF/R
files. There is no intention herein to claim any intellectual property that is not present in the existing
PDF standard, nor claim any IP that is covered therein.
PDF/R is intended to be a standard format for storing, transporting and exchanging scanned documents.
As a subset of PDF, it takes advantage of the widespread support for viewing, printing and processing
PDF files. As a narrowly restricted subset of PDF, it is much simpler to generate and interpret, allowing
it to replace the TIFF and JPEG file formats for capture and delivery of scanner output.
PDF/R imposes many restrictions on PDF content and layout, for the following benefits:
— files can be read and written without a full PDF parser or generator;
— files can be created efficiently from raster images;
— files can be generated using a fixed-size raster data buffer;
— images can be located and read efficiently with comparatively simple code;
— PDF/R files can be quickly and easily identified as such by software;
— PDF/R supports effective and readily available compression algorithms.
PDF/R has important advantages over the full PDF format for storing scanned documents:
— the raster image data can be recovered;
— a complex rendering engine is not required;
— it provides a precise, well-defined target, simplifying engineering design and testing.
PDF/R retains optional PDF security features useful for protecting content:
— encryption is allowed for implementations that need to protect document content at rest.
PDF/R retains optional PDF digital signature features useful for authenticating content:
— one or more digital signatures may be used for implementations that require verification of the
document origin, authenticity, date or time of creation, and so on.
PDF/R has important advantages over TIFF and JPEG for storing scanned documents:
— compared to TIFF, it has far fewer and simpler variants;
— compared to TIFF, compression is simpler and better standardized and supported;
— compared to TIFF, PDF files can be natively viewed and printed on more platforms;
— unlike JPEG, it is natively multi-page and handles bitonal images.
PDF/R was created by collaboration between the TWAIN Working Group, which originated the PDF/R
concept, and the PDF Association, which provided PDF technology expertise and perspective as well
as means of communicating with the PDF software industry to ensure a diverse range of relevant
viewpoints was represented.
INTERNATIONAL STANDARD ISO 23504-1:2020(E)
Document management applications — Raster image
transport and storage —
Part 1:
Use of ISO 32000 (PDF/R-1)
1 Scope
This document defines a subset of ISO 32000 suitable for storage, transport and exchange of multi-page
raster-image documents, including but not limited to scanned documents. Bitonal, grayscale and RGB
images are supported. Compression options for image data streams include JPEG, CCITT Group 4 Fax
and uncompressed.
2 Normative references
The following documents are referred to in the te
...
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