At various places in the Guidelines, for example, http://www.tei-c.org/release/doc/tei-p5-doc/en/html/ST.html#STECST there are statistics of number of elements using particular macros. It seems silly to have these manually hard coded in the text because we've probably not updated them in quite awhile, or may forget to do so in the future.
I'd recommend we change the Guidelines generation to either use <divGen> or <ptr> or something here to generate the table or their individual values.
Similarly we say in many places that the Guidelines contain 'around 500 elements', when the number of elements is easily countable when processing the guidelines.
In the same way we use <specDesc> in writing the Guidelines it seems silly to not have some mechanism to grab always changing details such as these.
I'm not proposing the correct mechanism to encode this in the Guidelines since that probably needs some discussion.