DIN ISO 14289-1-2016 Document management applications - Electronic document file format enhancement for accessibility - Part 1 Use of ISO 32000-1 (PDF UA-1) (ISO 14289-1 2014)《文件管理.pdf

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1、December 2016 English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 35.240.30; 37.100.99!%hL“259694

2、1www.din.deDIN ISO 14289-1Document management applications Electronic document file format enhancement for accessibility Part 1: Use of ISO 320001 (PDF/UA1) (ISO 142891:2014),English translation of DIN ISO 14289-1:2016-12Dokumentenmanagementanwendungen Verbesserung der Barrierefreiheit fr das Dateif

3、ormat von elektronischen Dokumenten Teil 1: Anwendung der ISO 320001 (PDF/UA1) (ISO 142891:2014),Englische bersetzung von DIN ISO 14289-1:2016-12Applications de la gestion de documents Amlioration de format du fichier du document lectronique pour laccessibilit Partie 1: Utilisation de lISO 320001 (P

4、DF/UA1) (ISO 142891:2014),Traduction anglaise de DIN ISO 14289-1:2016-12SupersedesDIN ISO 142891:201402www.beuth.deDocument comprises 23 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 A comma is used as the decimal marke

5、r. Contents National foreword 4 Introduction .6 1 Scope .7 2 Normative references 7 3 Terms and definitions .7 4 Notation .8 5 Version identification 9 6 Conformance requirements 9 6.1 General . 9 6.2 Conforming files . 9 6.3 Conforming reader 9 6.4 Conforming assistive technology .10 7 File format

6、requirements .10 7.1 General 10 7.2 Text . 11 7.3 Graphics . 11 7.4 Headings 11 7.5 Tables . 12 7.6 Lists 13 7.7 Mathematical expressions 13 7.8 Page headers and footers 13 7.9 Notes and references 13 7.10 Optional content . 13 7.11 Embedded files 13 7.12 Article threads 14 7.13 Digital signatures .

7、 14 7.14 Non-interactive forms 14 7.15 XFA 14 7.16 Security . 14 7.17 Navigation 14 7.18 Annotations. 15 7.19 Actions . 16 7.20 XObjects 16 7.21 Fonts 16 8 Conforming reader requirements .19 8.1 General 198.2 Text . 19 8.3 Tables . 20 8.4 Optional content . 20 8.5 File attachments and embedded files

8、 . 20 8.6 Digital signatures . 20 8.7 Actions . 21 8.8 Metadata 21 8.9 Navigation 21 8.10 Annotations. 21 PageDIN ISO 14289-1:2016-12 2 9 AT requirements 22 9.1 General 22 9.2 Optional content . 22 9.3 Navigation 22 Bibliography .23DIN ISO 14289-1:2016-12 3 National foreword International Standard I

9、SO 14289-1:2014 has been adopted, unchanged, as DIN ISO 14289-1:2016. The responsible German body involved in its preparation was DIN-Normenausschuss Information und Dokumentation (DIN Standards Committee Information and Documentation), Working Committee NA 009-00-15 AA Schriftgutverwaltung und Lang

10、zeitverfgbarkeit digitaler Informationsobjekte. International Standard ISO 14289-1:2014 on which this document is based has been prepared by Technical Committee ISO/TC 171 “Document management applications”, Subcommittee SC 2 “Application issues”. The content of ISO 14289-1:2014 has been adopted in

11、full. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. ISO 14289 consists of the following parts, under the general title Document manageme

12、nt applications Electronic document file format enhancement for accessibility: Part 1: Use of ISO 32000-1 (PDF/UA-1) Part 2: Use of ISO 32000-2 (PDF/UA-2)1)This standard differs from DIN ISO 14289-1:2014-02 as follows: a) in Clause 1 “Scope”, the reference to ISO 32000-1:2008 has been corrected; b)

13、in Clause 5, the method for specifying version and conformance has been clarified; c) bold type has been applied to the word “Caption” in 7.3; d) in 7.3, “Table 333” has been replaced by “Table 323” and a reference to Subclause 14.7.2 has been added: e) in 7.4.1, a reference to Subclause 14.7.2 has

14、been added; f) in 7.4.3, the expression “listed above” in the second sentence has been replaced by a reference to Subclause 7.4.2; g) in 7.4.4, bold type has been applied to the letter “H”; h) in 7.5, second paragraph, a “Scope” attribute is now only required if the tables structure is not determina

15、ble via “Headers” and “IDs”; i) in 7.6, second indent, “LI has been replaced by “L; j) in 7.17, last paragraph, a reference to Subclause 7.7.2 has been added; k) in 17.8.1, first paragraph, elements of Subtype “Popup” have been exempted from the requirements in this subclause; l) in 7.18.1, fourth p

16、aragraph, the requirements for “widget” annotations have been clarified; 1)Part 2 is under preparation (status as of October 2016). m) in Subclause 7.18.2, “7.17.1” has been replaced by “7.18.1”; n) in 7.18.5, first paragraph, the reference to ISO 32000-1 has been clarified to read “ISO 32000-1:2008

17、, 14.8.4.4.2”; o) in 7.18.8, the requirements for the handling of “PrinterMark” annotations have been clarified; p) in 8.8, NOTE, a reference to Subclause “12.2” has been added. DIN ISO 14289-1:2016-12 4 Previous editions DIN ISO 14289-1:2014-02 DIN ISO 14289-1:2016-12 5 Introduction PDF is a digita

18、l format for representing documents. PDF files may be created natively in PDF form, converted from other electronic formats, or digitized from paper. Businesses, governments, libraries, archives and other institutions and individuals around the world use PDF to represent considerable bodies of impor

19、tant information. These PDF files should be made accessible to users with disabilities. The accessibility of a document is dependent on the inclusion of a variety of semantic information in a document such as (but not limited to) machine-recoverable text presented in a declared language, logical str

20、ucture of content, and organization of that content in pages, sections and paragraphs. Semantic information can also contain a variety of descriptive metadata, such as alternative text for images. The primary purpose of ISO 14289 (known as PDF/UA) is to define how to represent electronic documents i

21、n the PDF format in a manner that allows the file to be accessible. This is accomplished by identifying the set of PDF components that may be used and restrictions on the form of their use. PDF/UA is intended as a companion standard, to be used in conjunction with ISO 32000, ISO 19005, ISO 15930 and

22、 other standards as may apply for the purpose of achieving accessibility or as mandated by this International Standard. In order for PDF/UA conforming files to be truly accessible, requirements on conforming readers and conforming assistive technology are also stipulated herein. By itself, PDF/UA do

23、es not necessarily ensure that the visual appearance of the content accurately reflects any original source material used to create the conforming file. For example, the process used to create a conforming file might substitute fonts, reflow text, downsample images, or use lossy compression. Organiz

24、ations that need to ensure that a conforming file is an accurate representation of original source material may need to impose additional requirements on the processes that generate the conforming file beyond those imposed by this International Standard. In addition, it is important for those organi

25、zations to implement policies and practices regarding the inspection of conforming files for correct placement of accessibility information. AIIM (an accredited standards developing organization) maintains an ongoing series of application notes for guiding developers and users of this International

26、Standard. These application notes will be displayed, when available, at http:/www.aiim.org/pdfua/app-notes. AIIM will also retain copies of the specific non-ISO normative references in this International Standard that are publicly available electronic documents.DIN ISO 14289-1:2016-12 6 Document man

27、agement applications Electronic document file format enhancement for accessibility Part 1: Use of ISO 32000-1 (PDF/UA-1) 1 Scope This part of ISO 14289 specifies the use of ISO 32000-1:2008 to produce accessible electronic documents. This part of ISO 14289 is not applicable to: specific processes fo

28、r converting paper or electronic documents to the PDF/UA format; specific technical design, user interface, implementation, or operational details of rendering; specific physical methods of storing these documents, such as media and storage conditions; required computer hardware and/or operating sys

29、tems. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 32000-1:2008, Do

30、cument management Portable document format Part 1: PDF 1.7 Web Content Accessibility Guidelines 2.0, W3C Recommendation, 11 December 2008. Available from the Internet . 3 Terms and definitions For the purpose of this document, the following terms and definitions apply. 3.1 assistive technology AT so

31、ftware and/or hardware used by a person with a disability that provides alternative controls and/or renditions to facilitate their access to and usage of available functionality and information 3.2 alternate description description of a structure element and its children SOURCE: ISO 32000-1:2008, 14

32、.9.3 Note 1 to entry: ISO 32000-1 uses both “alternate text” and “alternate description” to refer to the same item.DIN ISO 14289-1:2016-12 7 3.3 dictionary associative table containing key-value pairs, specifying the name and value of an attribute for objects, which is generally used to collect and

33、tie together the attributes of a complex object SOURCE: ISO 32000-1:2008, 4.17 3.4 interactive reader reader that requires or allows human interaction with the content and other objects contained in the document during the softwares processing phase Note 1 to entry: A file viewing tool is an example

34、 of an interactive reader; a raster image processor is an example of a reader that is not interactive. 3.5 Portable Document Format PDF file format defined in ISO 32000-1:2008 3.6 reader software application that is able to read and process PDF files appropriately SOURCE: ISO 32000-1:2008, 2.2 3.7 r

35、eplacement text text that is an exact replacement for the structure element and its children in cases where an AT device needs to read the element inline with the surrounding content SOURCE: ISO 32000-1:2008, 14.9.4 3.8 writer software application that is able to write PDF files SOURCE: ISO 32000-1:

36、2008, 2.3 4 Notation PDF operators, PDF keywords, the names of keys in PDF dictionaries, and other predefined names are written in bold font; operands of PDF operators or values of dictionary keys are written in italic font. Some names can also be used as values, depending on the context, and so the

37、 styling of the content will be context specific. EXAMPLE 1 The Default value for the TR2 key. Token characters used to delimit objects and describe the structure of PDF files, as defined in ISO 32000-1:2008, 7.2.1, may be identified by their ISO/IEC 646 character name written in upper case in bold

38、font followed by a parenthetic two digit hexadecimal character value with the suffix “h”. EXAMPLE 2 CARRIAGE RETURN (0Dh). Text string characters, as defined in ISO 32000-1:2008, 7.9.2, may be identified by their ISO/IEC 10646 character name written in uppercase in bold font followed by a parentheti

39、c four digit hexadecimal character code value with the prefix “U+”. EXAMPLE 3 EN SPACE (U+2002).DIN ISO 14289-1:2016-12 8 5 Version identification The PDF/UA version and conformance of a file shall be specified in the metadata stream that is the value of the Metadata key in the Catalog using the PDF

40、/UA Identification extension schema defined in Table 1. The Identification schema namespace URI is http:/www.aiim.org/pdfua/ns/id/. The required schema namespace prefix is pdfuaid. Table 1 PDF/UA Identification schema Property Value type Category Description pdfuaid:part Open Choice of Integer Inter

41、nal Required PDF/UA version identifier pdfuaid:amd Open Choice of Text Internal Optional PDF/UA amendment identifier pdfuaid:corr Open Choice of Text Internal Optional PDF/UA corrigenda identifier The value of pdfuaid:part shall be the part number of this International Standard to which the file con

42、forms. If the file conforms to a version of this International Standard that is defined by an amendment to a part, then the value of pdfuaid:amd shall be the amendment number and year, separated by a colon. The values of the pdfuaid:part, pdfuaid:amd and pdfuaid:corr properties do not by themselves

43、determine conformance with any part of this International Standard. 6 Conformance requirements 6.1 General ISO 14289 defines a file format for representing electronic documents known as “PDF/UA” and also defines how conforming readers and conforming assistive technology (AT) process such documents.

44、The version number of a file may be any value from 1.0 to 1.7, and the value shall not be used in determining whether a file is in conformance with this part of ISO 14289. NOTE The proper mechanism by which a file can presumptively identify itself as being a PDF/UA file of a given conformance level

45、is described in Clause 5. 6.2 Conforming files Conforming files shall adhere to all requirements of ISO 32000-1:2008 as modified by this part of ISO 14289. A conforming file may include any valid ISO 32000-1:2008 feature that is not explicitly forbidden by this part of ISO 14289. Features described

46、in PDF specifications prior to ISO 32000-1:2008 which are not explicitly defined in ISO 32000-1 should not be used. NOTE A conforming file is not obligated to use any PDF feature other than those explicitly required by ISO 32000-1 or this part of ISO 14289. A conforming file shall contain PDF/UA ver

47、sion identification as defined in Clause 5. A conforming file shall adhere to all file format provisions in Clause 7. 6.3 Conforming reader A conforming PDF/UA reader shall adhere to conforming reader provisions in ISO 32000-1:2008 as well as to all reader requirements of this part of ISO 14289. NOTE A conforming reader can also be integrated with conforming assistive technology.DIN ISO 14289-1:2016-12 9 6.4 Confor