Thanks Cindi. I do understand about Chapter.
But, in that same example page, would that same application work for Appendix if there were several Glossary identifiers, several Index identifiers.
My opinion is it would not, especially after reading another response from you from a year or two ago.
I think you answered a question from someone else that states the identifier separations are limited to front, body, and end matter. So, there are several identifiers in the end matter. If my brain comprehends it correctly, that won't work.