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
Perceivable content corresponds to nodes that contain information and are perceived by some categories of users.
This definition assumes that elements with a semantic role of
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
presentation. Note that if this is not the case, then Success Criterion 1.3.1: Info and Relationship is likely not satisfied.