(map subjectScheme) The %topicref-atts-for-subjectScheme; parameter entity represents the set of attributes used in the reltable map element. The set is similar to those documented in topicref-atts but for <reltable> the toc attribute defaults to no. For the other elements that use the %topicref-atts; group declaration, the toc attribute doesn't have a default; they can inherit their toc value from the nearest container, otherwise it functions upon output as if set to yes.