roletype role, an abstract role, is the base role from which all other ARIA roles inherit.
roletype role is an abstract role used for the ontology. It is included here for completeness of documentation. It should not be used by web authors.
roletype role's properties describe the structural and functional purpose of objects that are assigned this role, or "instances". A role is a concept that can be used to understand and operate instances.
Do not use.
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