PDF files are sometimes accessible, but the access can be limited or unpredictable. However, the results of the conversion depend on how the original PDF document was authored and are not always satisfactory. Accessibility is ultimately a human endeavor. It is determined by whether or not a diverse group of people with a variety of abilities and disabilities can access information efficiently. Bobby can help users make web pages more accessible, but can not guarantee total accessibility.
Authors are on the honor system.
We encourage authors to periodically retest pages with Bobby to make sure that the Bobby Approved rating still applies whenever pages are modified. The HTML validator checks that the HTML code of a web page is well-structured according to the HTML specification. Bobby evaluates web pages for accessibility to users with disabilities. It checks for the presence or absence of particular features, or their characteristics, but does not check HTML syntax. Nevertheless, because Bobby evaluates HTML it is important that there not be HTML errors.