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Guideline 3.1: Readable
”Make text content readable and understandable.“
Always set the document’s language
For the entire document (using document properties)
For specific sections (using the tags panel)
Provide glossaries and Indices
Mark up abbreviations
Example: Using tag properties to add alternative text 
to an abbreviated text.
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Principle 4: Robust
“Content must be robust enough that it 
can be interpreted reliably by a wide 
variety of user agents, including 
assistive technologies.”
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Guideline 4.1: Compatible
“Maximize compatibility with current and 
future user agents, including assistive 
technologies.”
Manually Provide Roles
Example: Using the tags panel
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Ensuring Accessibility at the 
Source
Conversion to accessible PDF from 
authoring application
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Conversion to PDF From Accessible 
Source Document
Advantages:
Tag structure automatically built based on styles / 
markup used
Significantly more efficient / effective than tagging 
PDF after conversion
Most accurate tag structure
Ability to edit  content without having to reapply 
tags in Acrobat
PDFMaker 
Add-on for popular business applications, such as MS 
Office and Lotus Notes
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Example Workflow: Creating an 
Accessible PDF Using MS Word
1. Use appropriate styles, e.g. 
Heading, list and 
paragraph.
2. Use PDFMaker add-on to 
create a tagged PDF File.
3. Use Acrobat Pro to inspect 
and repair document  if 
needed.
Legacy Documents
Repairing existing inaccessible PDF 
files
Repairing Scanned Documents
Use Acrobat’s OCR feature
Scanned text will be recognized and converted to 
actual text.
OCR Makes a text in a scanned document:
Searchable
Selectable
Perceivable by assistive technology
OCR is not perfect 
You must manually fix ‘OCR suspects’
Document still requires a tag structure
Adding and Editing the Tag Structure
Acrobat Pro provides several tools for tagging:
‘Add Tags to Document’ command
Accessibility Check
Creates overview of accessibility issues, including tag 
related 
Provides quick link to each issue
Touch Up Reading Order (TURO) Tool 
Allows content to be selected and assigned a tag type
Tags Panel 
Allows tag structure to be edited manually
Wrapping Up
To Summarize:
PDF documents can always be made accessible and 
WCAG 2.0 compliant
Create accessible source documents, then convert to 
tagged PDF.
Use Acrobat Pro tools to repair accessibility problems
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