You can use PI markers to provide text alternatives (and other attributes) for links. The attribute applies to the next link after the PI marker. The PI marker name must start with Link and end with the name of the attribute:
For example, to provide a title attribute for each link, place a LinkTitle marker just before the link.
To assign a CSS class to a link, see §28.2.2.1 Assigning a link class with a PI marker.