Overriding a nav element's default role of navigation landmark must only be done in special cases. NOTE: Deprecated in favor of HTML 3 a more general rule on role restrictions based on ARIA in HTML specification.
A nav element has role restrictions as part of its definition in the W3C HTML5 Specification to help ensure the nav element semantics of identifying navigation landmark content.
A nav element should only use role="presentation" if the content of the nav element is not being used to identify navigation landmark content (e.g. repairing poor page semantics).
Information about the element associated with the result.
The information typically includes the tag name, accessible name or other information related to the rule requirements.
"Page" means that the result applied to the page. For example, the rule "One main landmark on the page" is a page level rule.
The element position is based on the DOM order of elements in the page.
The element position maybe useful in helping to locate a specific element on the page evaluated (e.g smaller numbers are typically toward the beginning of a page and larger numbers typically toward the end of a page).
Element position 1 is the first element.
The highest element position is the last element.
Element position values for most rule/page results will not be consecutive since a rule only applies to a sub set of elements found on a page.