Group items tagged

A PDF file equipped with well-formed tags may be "reflowed" to fit different page or screen widths, and will display well on handheld devices. Tagged PDF files also work better with the screen-reader devices used by many blind and other disabled users. In most cases, tags are necessary in order to make a PDF file comply with Section 508.

Some people see the legal obligation to follow Web content accessibility guidelines - whether of the W3C or, in the US, of section 508 - as leading to boring text-only pages. Actually, these guidelines do not exclude the use of multimedia on the web. They say that multimedia should be made accessible by "Providing equivalent alternatives to auditory and visual content" and in particular: "For any time-based multimedia presentation (e.g., a movie or animation), synchronize equivalent alternatives (e.g., captions or auditory descriptions of the visual track) with the presentation."[1]

(a) A text equivalent for every non-text element shall be provided (e.g., via "alt", "longdesc", or in element content).\n\n(b) Equivalent alternatives for any multimedia presentation shall be synchronized with the presentation. ...