LibGuide Design: Best Practices and Guidelines

• All applets, scripts and plug-ins (including PDF and PowerPoint files, etc.) and the content within them are accessible to assistive technologies, or else an alternative means of accessing equivalent content is provided. 

• A PDF file can be made accessible to screen reader users, but it may be best to include an accessible HTML version of a document instead of or in addition to PDF. 

Accessible PDFs include but are not limited to the following characteristics:

• Searchable text

• Sans-serif fonts that allows for characters to be extracted to text
• Document structure tags and proper reading order
• Alternative text descriptions for non-text elements such as images, video and audio
• Interactive features: Hyperlinks and Navigational Aids such as table of contents that link to sections, and defined headings that will allow users to navigate through the content without having to rely on a screen reader to read through the entire document. 

Learn more about creating Accessible PDFs by reading Adobe's PDF Accessibility Overview

Additional Sources for verifying PDF accessibility

Create and verify PDF accessibility (Acrobat Pro): Acrobat tools make it easy to create accessible PDFs and check the accessibility of existing PDFs. You can create PDFs to meet common accessibility standards, such as Web Content Accessibility Guidelines (WCAG) 2.0 and PDF/UA (Universal Access, or ISO 14289). The simple, guided workflow lets you do the following:

Make PDFs accessible: A predefined action automates many tasks, checks accessibility, and provides instructions for items that require manual fixes. Quickly find and fix problem areas.

Check accessibility: The Full Check/Accessibility Check tool verifies whether the document conforms to accessibility standards, such as PDF/UA and WCAG 2.0.

Report accessibility status: The Accessibility Report summarizes the findings of the accessibility check. It contains links to tools and documentation that assist in fixing problems.

Accessible tables have the following characteristics:

• defined column and row headers to convey meaning to the table structure
• prefaced by a summary of table's contents and purpose for non-sighted user that will be read aloud by their screen reader
• not used as a layout device unless necessary 
• do not have split cells, merged cells or blank rows and columns 

Learn more about creating accessible tables

• Princeton University's Digital Accessibility page on tables, including best practices and examples of what not to do
• How to create tables in LibGuides
• Tables Bookmarklet for Accessibility Testing is a tool that will highlight components of a table on an active webpage and isolate error cells with a red dotted line to indicate areas that need to be edited.