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Accessibility Glossary

WCAG criteria, patterns, and standards — with interactive demos, detection methods, and audit data.

WCAG principle 3 of 4 (POUR): content and controls must be clear and predictable, and help people avoid and recover from mistakes.

10 terms

A

Accessible Authentication 3.3.8 Understandable

C

Consistent Help 3.2.6 Understandable Consistent Identification 3.2.4 Understandable Consistent Navigation 3.2.3 Understandable

D

Document Language Essential 16% audit fail rate 3.1.1 Understandable

E

Error Identification Essential 62% audit fail rate 3.3.1 Understandable Error Prevention 3.3.4 Understandable

L

Label in Name 2.5.3 Understandable

P

Plain Language Understandable

R

Redundant Entry 3.3.7 Understandable