https://www.w3.org/WAI/tutorials/forms/grouping/
Grouping Controls | Web Accessibility Initiative (WAI) | W3C
Accessibility resources free online from the international standards organization: W3C Web Accessibility Initiative (WAI).
web accessibility initiativegrouping controlswai
https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20160317/ARIA17
ARIA17: Using grouping roles to identify related form controls | Techniques for WCAG 2.0