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Accessibility

Accessibility

Information

RWTHjupyter pages should follow accessibility guidelines. The relevant accessibility criteria to be followed are listed below.

Perceivable

  • Non-text-content
    • Alternative texts for control elements
    • Alternative texts for graphics and objects
    • Empty alt attributes for layout graphics
    •  Alternatives for CAPTCHAs
  • Alternatives for audio files and silent videos
  • Recorded videos with subtitles
  • Audio description or full text alternative for videos
  • Videos (live) with subtitles
  • Information and relationships
    • HTML structural elements for headings
    • HTML structural elements for lists
    • HTML structural elements for quotations
    • Content organised
    • Data tables structured correctly
    • Assignment of table cells
    • No structure markup for layout tables
    • Labelling of form elements can be determined programmatically
  • Meaningful and sensible sequence
  • Can be used without reference to sensory characteristics
  • No restriction on screen orientation
  • Input fields for user data convey the purpose
  • Can be used without colours
  • Audio control: sound can be switched off
  • Sufficient contrast of texts
  • Text size can be changed to 200
  • No font graphics
  • Use pagination for content
  • Sufficient contrast of graphics and control elements 
  • Adjustable text spacing
  • Displayed content can be operated

Operable

  • Keyboard operability: Can be used without a mouse
    • Conclusive sequence for keyboard operation
    • Visible focus: Current position of the focus is clear
    • No keyboard trap
    • Keyboard shortcuts can be switched off or customised
  • Time-related limits customisable
  • Moving content can be switched off: pause, end, hide
  • Photosensitivity and ellipse: maximum of three flashes per second to fall below threshold values
  • Element groups and areas can be skipped
  • Meaningful web page titles and document titles
  • Purpose of a link (in context): Meaningful link texts
  • Alternative ways to access content
  • Meaningful headings, labelling and descriptions
  • Alternatives for complex pointer gestures
  • Pointer gesture inputs can be cancelled or revoked
  • Symbols in written form for screen readers
  • Interface components as alternatives for motion activation

Understandable

  • Specify main language, e.g. in HTML
  • Words and sections in other languages labelled 
  • No unexpected context change in focus
  • No unexpected context change on input
  • Navigation elements and mechanisms are standardised and consistent
  • Uniform and consistent labelling of components with the same functionality
  • Labelling of form elements available when user input is required
  • Incorrect entries
    • Error detection identifies errors and describes them as text
    • Correction suggestions: Help with errors
    • Error prevention is supported

Robust

  • Syntax analysis: Syntax is correct and complete
  • Name, role and value are available and can be defined programmatically
  • Status messages can be defined programmatically

last changed on 05/27/2025

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