![]() There are tag labels for HTML and others for PDF/UA. Don’t make the mistake of confusing these very different markup languages and purposes, thinking that all pointy bracket are the same.Ī is just a label encoded into the file. All markup languages use different sets of tags: XML, HTML, xHTML, PDF accessibility, IDTT, SGML, etc. Just because a file uses pointy bracketed doesn’t mean that the tags are used for the same purpose, or that the same tags are used the same way by these different technologies. HTML uses the null tag (empty quotes “”).īe careful. However, only PDF has the Artifact tag which allows you to indicate that the graphic is insignificant and can be skipped by assistive technologies.All graphics use Alt-text in both standards.There is no CSS (cascading stylesheet) formatting in PDFs.There is no summary tag available in PDFs, which is often used for tables in HTML.But only PDFs divide s into sub-tags: for the bullet/number character and for the text of the list item.All lists in both standards use to label each individual item in the list.But in PDFs, there’s only one tag - for both bulleted and numbered lists. Bullet lists in HTML use and numbered lists use.PDF/UA-1 was approved and published by the ISO as ISO 14289-1.Ī future blog will detail which tags are in which standard, but for now, here’s a short list of the tags most often confused. PDF/UA is developed and written by the PDFA (the PDF Association). WCAG 2.0 was approved and published by the ISO as ISO/IEC 40500:2012. WCAG is developed and written by the WAI (Web Accessibility Initiative), a subcommittee of the W3C (World Wide Web Consortium). Who develops, approves, and publishes the standards: The PDF/UA standard has 31 checkpoints.The WCAG standard (that’s the standard, not the tags) has more than 50 checkpoints, success criteria, and guidelines that must be met.(See ) They are designed specifically to label and interpret PDF document content. The PDF standard has fewer than 30 PDF tags.(See ) They are designed specifically for web content and how it is presented, interpreted, and rendered. The HTML 5 mark-up language has nearly 200 tags.Many other technologies benefit from this common markup, such as CMS (content management systems), search engines, and cross-media publishing.Both standards are managed and published by the International Organization for Standardization ( ISO) based in Europe, but each standard is developed by different nonprofit organizations.Example: and designate heading levels 1 and 2 in both standards. Both standards use a similar - but not identical - set of universally recognized tags to mark up the content.Both WCAG and PDF/UA have the same goal: to mark up content so that it is universally readable by computer technologies, including assistive technologies used by those with disabilities.So we thoroughly cover WCAG in our web accessibility classes, and focus on PDF/UA in our document accessibility classes. The two standards are designed to complement each other and harmonize, but there are significant differences and similarities that are detailed below. The accessibility standard for documents, specifically PDF documents, is PDF/UA (PDF Universal Accessibility).WCAG ( Web Content Accessibility Guidelines) is for websites and HTML-based material.Well, we do, but it’s only a short overview when we’re teaching Word and PDFs. This short tutorial clears up the confusion about accessibility standards and helps you select the correct standard for your website, Word files, PDFs, and other digital content.Ī prospective client asked if we cover WCAG in our accessible Word and PDF classes. ![]()
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