Faithlife has already produced datasets for systematic theologies and confessional documents. Both of these document types can be sorted based on tradition in the passage guide, and for systematic theologies there is even an interactive that further allows browsing by author, era, and type. It seems the next logical step towards this sort of library organization would be for a commentaries dataset. The idea of Faithlife adding extra metadata to commentaries has been brought up before, and users have put a ton of effort into various commentary collections, but maybe now is a good time to actually do this and do it "right" with a proper dataset. I'm thinking Faithlife should use all the faceting browsing categories included in the systematic theologies interactive, but also include "series" and "book" (of the Bible) as well. Then, in the passage guide allow users to pick how they want their commentaries displayed using the same options available in the interactive. We could quickly switch from sorting by "era" to "denomination" to "type" etc. without having to constantly build or edit custom passage guide templates. What do you say?