Perceivable content

A node is perceivable content if all the following are true:

• the node is palpable content; and
• the node is either visible or included in the accessibility tree; and
• if the node is an element, it does not have a semantic role of none or presentation.

Perceivable content corresponds to nodes that contain information and are perceived by some categories of users.

Assumptions

This definition assumes that elements with a semantic role of none or presentation are pure decoration and that elements which are pure decoration either are not included in the accessibility tree or have a semantic role of none or presentation. Note that if this is not the case, then Success Criterion 1.3.1: Info and Relationship is likely not satisfied.