Rule PDF-TAGS-13
Mathematical formulas must be identifed with the Formula tag and Alt entry that describes the image


Best Practice Type: Manual Check

  • The alt text content should include MathML, Latec or other common representation of mathematical equations



Associated Accessibility Guidelines and Standards

Guideline or
Requirement Priority Test
IITAA 4.1 Provide appropriate "alternate text" for all images. Required Manual Check
4.2 Provide full descriptions for graphs, diagrams, and other meaningful images. Required Manual Check
Section 508 1194.22 (a) A text equivalent for every non-text element shall be provided (e.g., via "alt", "longdesc", or in element content). Required Manual Check
WCAG 1.0 1.1 Provide a text equivalent for every non-text element (e.g., via "alt", "longdesc", or in element content). This includes: images, graphical representations of text (including symbols), image map regions, animations (e.g., animated GIFs), applets and programmatic objects, ascii art, frames, scripts, images used as list bullets, spacers, graphical buttons, sounds (played with or without user interaction), stand-alone audio files, audio tracks of video, and video. Required Manual Check
WCAG 2.0 1.1.1 Non-text Content Required Manual Check
4.1.2 Name, Role, Value: For all user interface components (including but not limited to: form elements, links and components generated by scripts), the name and role can be programmatically determined; states, properties, and values that can be set by the user can be programmatically set; and notification of changes to these items is available to user agents, including assistive technologies. Required Manual Check



Evaluation Techniues

Testsuite Tests