This is a list of the GIs of the elements which are to be displayed, if present in the document, when routineprologues are formatted. If "diytopic" is present in this list, it represents all the diytopic elements, which are formatted together.
Although one might expect the "purpose" element to appear here, it is normally displayed using formatting different to that of other elements in this list, so is best handled explicitly by formatting routines.
Type: list of strings
List of string names of element types.