What are the rules or checklist of items upon which the guidelines of WCAG 2.0 are based?

The guidelines of WCAG 2.0 are structured around Success Criteria, which form the foundational requirements for web accessibility. Each Success Criterion provides a specific measure by which web content can be evaluated for accessibility. These criteria are categorized into three levels of conformance: A, AA, and AAA, with each level representing increasing standards of accessibility.

Success Criteria address various aspects of accessibility such as perceivable, operable, understandable, and robust content, ensuring a comprehensive approach to meeting the needs of individuals with disabilities. By following the Success Criteria, developers and web designers can create content that is not only usable but also inclusive for a wider audience.

While Sufficient Techniques and Advisory Techniques provide guidance on how to meet the Success Criteria, they do not serve as the baseline rules themselves. Sufficient Techniques offer examples of methods that meet the criteria, while Advisory Techniques are recommendations that can help improve accessibility but are not mandatory for conformance. Therefore, Success Criteria serve as the essential rules upon which WCAG 2.0 guidelines are based, making them crucial for understanding how to achieve compliance.