Creating PDF Documents
Creating Tagged PDF Documents
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44
Acrobat SDK User’s Guide
Adding Structure Data to a PDF Document
Creating a tagged document directly from an authoring application is the best way to make
PDF documents accessible to screen readers and reflow correctly on handheld devices.
If your PDF document was created without tags, Acrobat can add them. The tagging
feature identifies most elements of a PDF document, including irregularly shaped columns,
bulleted lists, captions that span columns, images that overlap text, and colored
backgrounds.
From a plug-in, you can add structural information to any PDF file with the
PDSEdit
API.
Once a file has logical structure,
PDSEdit
allows you to use it. For more information, see
“Using Document Logical Structure” on page 51
and the
Acrobat and PDF Library API
Overview
.
Using pdfmark to Add Structure Data to PDF
Advanced Acrobat features are generated using the
pdfmark
PostScript operator. The
authoring application must generate a PostScript language file that contains the
appropriate pdfmark operators for the document structure desired. This resulting
PostScript language file is converted into a PDF file via Distiller.
The
pdfmark
operator is not a standard PostScript operator, but is provided as a PostScript
language extension used by Distiller to describe features that are present in PDF, but not in
standard PostScript. The
pdfmark
operator has been available beginning with Distiller 3.0,
and has evolved with each release of the PDF specification.
N
O T E
:
While the
pdfmark
operator provides for greater extensibility, it is not intended to
define every feature that is present in PDF but not in standard PostScript.
For more information, see the
pdfmark Reference Manual
and the
PDF Reference.
Содержание Acrobat 7.0.5
Страница 10: ...Contents 10 Acrobat SDK User s Guide ...
Страница 66: ...Modifying the User Interface Customizing Acrobat Help 6 66 Acrobat SDK User s Guide ...
Страница 72: ...Using Online Collaboration and Annotations Using Stamps in Approval Workflows 7 72 Acrobat SDK User s Guide ...
Страница 78: ...XML and the Acrobat SDK Managing XML based Information 8 78 Acrobat SDK User s Guide ...
Страница 100: ...Providing Document Security Document Rights 11 100 Acrobat SDK User s Guide ...
Страница 106: ...Working with Metadata Object Data 12 106 Acrobat SDK User s Guide ...
Страница 110: ...Searching and Indexing Indexing PDF Documents 13 110 Acrobat SDK User s Guide ...
Страница 118: ...Working With PDF Layers Working with Layers from a Plug in 15 118 Acrobat SDK User s Guide ...