Changes for page PDF/UA

Last modified by Kashif Iqbal on 2019/03/05 15:17

From version < 1.3 >
edited by Kashif Iqbal
on 2019/03/04 16:25
To version < 2.1 >
edited by Kashif Iqbal
on 2019/03/04 16:28
< >
Change comment: There is no comment for this version



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17 17  The end result of a document built using the PDF/UA spec is a more reliable, more accessible document that avoids the tricks and traps that PDF can present. PDF authors don’t need to know anything specific about what goes on behind the scenes; the tools themselves are responsible for adding and preserving the accessibility of the PDF. That’s the value of PDF/UA.
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19 +The PDF/UA specification defines conformance for three different aspects of PDF: content, readers, and assistive technology. The authoring tools are intentionally omitted: only the content they produce matters here, and that can only be measured at the individual document level.
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21 +== Confirming Files ==
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23 +A conforming file contains features that are valid according to the PDF 1.7 spec, except for features PDF/UA specifically forbids. It has to be marked as a PDF/UA document as described in Section 5, and meet all the requirements in Section 7 below.
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25 +== Confirming Readers ==
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27 +A conforming reader must also be a conforming reader according to PDF 1.7. It will support all the tags, attributes and key values specified for accessibility, and respect when optional content is hidden. It will make the logical reading order available. It will allow AT to inspect artifacts, and its interface must itself be accessible, and not interfere with any AT feature.
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29 +There are some repair techniques for headings and tables, rules for handling optional content, attached and embedded files, digital signatures, actions, metadata, navigation, annotations, forms and media.
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31 +== Conforming Assistive Technology ==
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33 +A conforming AT supports all of the features of the content and the reader, and should allow navigation by page labels, document structure, or the outline. It should also let the user override default navigation zoom. (A combined reader and AT, perhaps something like TextHelp’s PDF Aloud, could be both a conforming reader and a conforming AT.)
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19 19  == References ==
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21 21  * [[PDF/UA - By Wikipedia>>]]