Adobe ACROBAT 9 HOW-TOS - Basic Document Tagging

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Basic Document Tagging
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47
Checking for Tags
Check for preexisting tags by
choosing Advanced > Acces-
sibility > Quick Check. The
Accessibility Quick Check
looks for a document struc-
ture (tags). An untagged
document displays a mes-
sage stating that the lack of
structure may cause a prob-
lem with reading order.
A Structure and Tags
Aren’t Equal
Some programs create a
structured document that
often is fine for reading in
Acrobat. For example, creat-
ing a Word document using
styles in a heading hierarchy
is an example of a structure.
A structure doesn’t provide
some of the qualities in an
accessible document such
as word spacing; you must
tag a document to make it
compliant with accessibility
standards.
Planning Documents for PDF Accessibility
The key to successful tagging of a document as well as making it comfortable
for a user working with a screen reader is to use your source programs’ features
efficiently. Plan ahead:
•
Configure the document pages correctly. For example, don’t add blank lines
to make a space.
•
Check the styles attached to inserted material such as images and charts.
•
Group tables and charts or convert them to an image to prevent creating indi-
vidual tags for each line and word segment.
#47: Basic Document Tagging
Some program features that are used to enhance accessibility don’t work
properly or predictably unless a document is tagged, which means it has
a logically dened structure. Tags are a part of the document’s informa-
tion that denes relationships among elements in the document, includ-
ing tables, lists, images, and text.
Tagging can be done in the source document (if you’re using a PDF-
Maker) or in Acrobat. To tag a document using a PDFMaker, choose Adobe
PDF > Change Conversion Settings. In the Settings tab, select “Enable
accessibility and reow with Tagged PDF” and then click OK. The tags
are created when the PDF le is generated.
Open the document in Acrobat and choose View > Navigation Panels >
Tags. Click the Tags icon to display the document’s tags in a hierarchy
(Figure 47). The gure shows a section of the Tags pane for an Excel
spreadsheet. The parent tag <Workbook> holds a <Worksheet> that con-
tains a <Table>, which contains tags for the table rows <TR>, which in
turn contain tags for table cells <TD>, which contain the cell’s <Content>,
which are text objects.
Selected tag
Highlighted content
Figure 47 The tags in a document are listed in a hierarchy.
In the gure, notice that the top row of text is highlighted—a useful
behavior for locating content on the page quickly. Choose Highlight Con-
tent from the Options menu. Selecting a parent tag, such as the <TR> tag,
automatically selects the child <TD> tags.
From the Library of Daniel Dadian