Elements added to make it easier to process journal articles in ways that are more accessible to people and devices with special needs, for example the visually handicapped. The <alt-text> element holds a short phrase description of an object such as a graphic, <long-desc> is a more complete description of the content or intent of an object, and the <ext-link> in this grouping would point to an alternate form of the object.
<!ENTITY % access.class "alt-text | ext-link | long-desc" >
journalpubcustomize.ent