So, it seems possible to do e.g.
and generate a Chicago B-formatted output of a certain tag, though clearly not (yet) a certain tag within a certain collection. I suppose the code would have to load an array of items in a given collection and an array of items with a given tag, then compare the two arrays to identify common items...you're right that this would necessitate multiple API calls, but I could imagine the routine could be generalized so that it could handle any two requirements (e.g., items that have tag A and tag B).
I'd like to go back to my first question, if possible, as well as my latest question:
(a) When I enter e.g. [zotpress userid="45298" tag="cultural+politics"] I get "Sorry, but Zotpress was unable to contact the Zotero server. (Try again?)" The same happens whether or not I enter the userid, and as you can see from the API above the groupID and tag should work. What is wrong with the syntax of my shortcode?
(b) Which of the filters noted on your Zotpress help tab can be combined? I would imagine any of the display settings can be combined, and that at least some of the filter settings (e.g., collection and tag) cannot, but perhaps other filters can?
Many thanks again for all your great support!