<p>The Roles Model uses the following relationships to relate <abbr title="Accessible Rich Internet Applications">WAI-ARIA</abbr> roles to each other and to concepts from other specifications, such as HTML.</p>

<section id="superclassrole">

<h3>Superclass Role</h3>

<p>The <a>role</a> that the current subclassed role extends in the Roles Model. This extension causes all theproperties andconstraints of the superclass role to propagate to the subclass role. Other than well known stable specifications, inheritance may be restricted to items defined inside this specification, so that external items cannot be changed and affect inherited classes.</p>

<p>The <a>role</a> that the current subclassed role extends in the Roles Model. This extension causes all thestates andproperties of the superclass role to propagate to the subclass role. Other than well known stable specifications, inheritance may be restricted to items defined inside this specification, so that external items cannot be changed and affect inherited classes.</p>

</section>

<section id="subclassroles">

<h3>Subclass Roles</h3>