All
Publication Resources that are hyperlinked to from Publication Resources in the
spine must themselves be listed in the
spine, where hyperlinking is defined to be any linking mechanism that requires the
User to navigate away from the current resource. Common hyperlinking mechanisms include the
href attribute of the
[HTML] a and
area elements and scripted links (e.g., using DOM Events and/or form elements). The requirement to list hyperlinked resources applies recursively (i.e., all Publication Resources hyperlinked from hyperlinked Publication Resources also have to be listed, and so on.).