structure
A document structural element.
Abstract roles are the foundation upon which all other WAI-ARIA roles are built. Content authors MUST NOT use abstract roles because they are not implemented in the API binding.
Description
A document structural element.
Roles for document structure support the accessibility of dynamic web content by helping assistive technologies determine active content versus static document content. Structural roles by themselves do not all map to accessibility APIs, but are used to create widget roles or assist content adaptation for assistive technologies.
Note: structure is an abstract role. Authors should not use this role in content.
Characteristics
Reference