What does the term "POUR" in WCAG represent?

The term "POUR" in WCAG stands for Perceivable, Operable, Understandable, and Robust, which are the four principles of web accessibility that underpin the guidelines. Each of these principles plays a critical role in making web content accessible to individuals with disabilities.

1. Perceivable: This principle means that information and user interface components must be presented in a way that users can perceive. For example, text alternatives should be provided for non-text content (like images) so that users with visual impairments can understand the content.

2. Operable: Under this principle, the user interface must be operable. This means that users must be able to navigate and interact with all elements in a way that suits their capabilities, which includes ensuring that all functionality is accessible from a keyboard, for example.

3. Understandable: Content must be clear and understandable, which involves using readable language and predictable navigation. Users should be able to interpret and comprehend the information without ambiguity.

4. Robust: The content must be robust enough to be reliably interpreted by current and future assistive technologies. This means that websites should adhere to established standards and provide compatibility with a wide range of user agents.

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