Documents must have <title> element to aid in navigation

Ensure each HTML document contains a non-empty <title> element

Links must be distinguishable without relying on color

Ensure links are distinguished from surrounding text in a way that does not rely on color

Links must be distinguishable without relying on color

Ensure links are distinguished from surrounding text in a way that does not rely on color

Links must be distinguishable without relying on color

Ensure links are distinguished from surrounding text in a way that does not rely on color

Heading levels should only increase by one

Ensure the order of headings is semantically correct

Page should contain a level-one heading

Ensure that the page, or at least one of its frames contains a level-one heading