Available Indexes

Commitment to Accessibility

Voluntary Product Accessibility Template (VPAT)®

A Voluntary Product Accessibility Template (VPAT)® reports on the accessibility of a digital product or technology. Our most recent VPAT can be found below.

  • VPAT Version 2, January 2020 (docx file) (pdf file) - What has changed: At the end of 2019, we fixed the following problems:
    • Reflow (the page changing to accommodate higher levels of zoom so the user doesn’t have to scroll horizontally across the page) is only supported in text-only view, not any other pages. Reflow is a feature that is helpful to users with low vision to be able to zoom in on a page and not have their browsing interrupted by having to scroll horizontally as well as vertically (this can also be particularly difficult for users with low vision who also have a motor impairment). (WCAG 2.1, Level AA criteria 1.4.10 Reflow)
    • Most errors and alerts are read to screen readers but there are a few that aren’t: in PageTurner and search results, “you must select a collection” and “item added” alerts. ((WCAG 2.1, Level AA criteria 4.1.3 Status Messages)
  • VPAT Version 1, 08/2019 (docx file) (pdf file

Following is a list of the exceptions that are noted in the VPAT. 

Partially supported:

  • Most of the site is fully keyboard accessible (can be used with just a keyboard and no mouse), but when a book is zoomed in in PageTurner, users can only scroll horizontally across the page by using a mouse.
  • Contrast issues - most of the site has sufficient color contrast for users with low vision but there are a few exceptions: suggested text in text input fields, text input field outlines on forms throughout the site, page selection for download in PageTurner against a white page, hide menu button in PageTurner against white background.
  • Error identification and suggestion issues - several issues with errors not being properly identified or not having clear suggestions for correction (mostly around special characters used in searches).
  • Font type can be modified with browser extensions on most of the site, except for text in form fields, some subtitles and headings, and error messages.

Not supported:

  • Language HTML tagging when parts of the page (e.g. book text, metadata info) are in a language different from the site default (English) is not supported. This means that screen reader users wouldn’t be able to read books and info in non-English languages unless they manually change the language in their screen reader settings.

Accessibility Review Process

We reviewed the accessibility of the HathiTrust Digital Library using the following methods.

ARIA markup

We’ve marked up the digital library following the Accessible Rich Internet Applications (ARIA) protocol. Using this standard helps screen readers and other assistive technology better understand different features and functions of our site and gives users the ability to navigate dynamic content much more effectively.

File HathiTrust-VPAT2.3-012020.docx81.03 KB
PDF icon HathiTrust-VPAT2.3-012020.pdf295.68 KB