The various parts of an integral have special meaning. Using the audio notation would produce a rendering that cues the subscript and superscript on the integral, leaving it to the listener to interpret their meaning. Rule descriptive for object integral (see fig:descriptive-integral) interprets the subscript and superscript as the limits of integration. Integrals having no superscript are interpreted as surface integrals. The rule also correctly identifies the variable of integration in the majority of examples.
: Descriptive rendering rule for integrals.
We have a similar rendering rule for summations that interprets the subscript as a constraint on the summation. The rule also correctly renders examples where the subscript and superscript to the summation operator give the lower and upper bound on the range of summation.