Use opening and closing tags according to specification
no. 006
Make sure HTML tags are properly opened and closed
Browsers and other user agents, including assistive technologies, can accurately interpret and parse HTML content as long as opening and closing tags are used according to the HTML specification. The goal is to avoid incorrect formatting errors that will potentially cause assistive technologies and other user agents to inaccurately interpret the markup and lead to misleading or false information due to markup not being used as expected.
To do this, simply ensure that user agents, including assistive technologies, can accurately interpret and parse content. If the content cannot be parsed into a data structure, then different user agents may present it differently or be completely unable to parse it. Specify the version of HTML used and rely on a validation service to make sure the markup does not contain errors related to incorrectly formed opening and closing tags. When HTML documents are free of such errors, the interpretation by assistive technologies such as screen readers will be much smoother and the information conveyed to users, that much more accurate.
User Story
As a user using assistive technology, I want my tools to reliably interpret the [...]