# Axe: Parsing (`parsing`) `axe/parsing` contains accessibility rules from the axe parsing category. See the ["Can the hint be configured?"][can configure] section of `hint-axe` for examples of enabling, disabling, and changing the severity of individual rules. ## Default rules (WCAG 2.1 Level A and Level AA) * [id attribute value must be unique][duplicate-id] (duplicate-id) * [IDs of active elements must be unique][duplicate-id-active] (duplicate-id-active) * [IDs used in ARIA and labels must be unique][duplicate-id-aria] (duplicate-id-aria) * [\ elements are deprecated and must not be used][marquee] (marquee) [can configure]: https://webhint.io/docs/user-guide/hints/hint-axe/#can-the-hint-be-configured [duplicate-id]: https://dequeuniversity.com/rules/axe/4.4/duplicate-id [duplicate-id-active]: https://dequeuniversity.com/rules/axe/4.4/duplicate-id-active [duplicate-id-aria]: https://dequeuniversity.com/rules/axe/4.4/duplicate-id-aria [marquee]: https://dequeuniversity.com/rules/axe/4.4/marquee