Techniques for WCAG 2.0

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PDF1: Providing definitions for abbreviations by setting expansion text

Applicability

PDF documents containing abbreviations or acronyms

This technique relates to:

Description

The objective of this technique is to provide expansions or definitions for abbreviations by setting expansion text. This technique is applicable for any abbreviation, including acronyms and initialisms.

Examples

Example 1: Indicating abbreviations in Acrobat Pro

To apply, perform the following steps in Acrobat Pro:

  1. Ensure that the document is tagged

  2. Select the abbreviated text that needs to be expanded. If the selected text is part of a larger tag, use the "create tag from selection" command in the tags panel options menu, and create a new "span" tag.

  3. In the tags panel, open the properties dialog for the tag corresponding to the selection.

  4. In the tag's properties dialog, on the "content" tab, enter the expanded text, optionally followed by the originally selected text.

This technique is illustrated in the following screenshot:

screen shot showing the addition of expansion text to an abbreviation in Acrobat Pro's Touch Up Read Order tool

Resources

Resources are for information purposes only, no endorsement implied.

Tests

Procedure

  1. Use a tool which is capable of showing accessibility information, such as Inspect32 or Adobe Acrobat Professional and open the PDF document.

  2. Check that the expansion text for the abbreviation is available with a tool that exposes this information

    • Use a screen reader that is capable of speaking the abbreviation expansion.

    • In Inspect32, locate the text of the abbreviation and ensure that the expansion text is in view.

    • In Adobe Acrobat, locate the tag for the text that is the abbreviation, and check that an expansion or definition is provided for each abbreviation via the "Text Expansion" field in the corresponding tag's properties.

    • An expansion is provided via an E property of the structure element containing the abbreviation in the PDF file - Loretta to check out.

Expected Results

#2 is true.