Cbmg

link-name

Ensure links have discernible text

heading-order

Ensure the order of headings is semantically correct

landmark-main-is-top-level

Ensure the main landmark is at top level

landmark-no-duplicate-main

Ensure the document has at most one main landmark

landmark-unique

Ensure landmarks are unique

page-has-heading-one

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

region

Ensure all page content is contained by landmarks