Is there any font classification service (web page, app, book) that classifies fonts by x-height, ascender and descender lengths, stroke contrast, apertures and counters, besides the basic serif and sans-serif classifications? Also if if the font is made for heading, body, etc.

Beside the obvious sans category, what classification would best suit FF Blur? Contemporary or "ambiguous" are all I can come up with. I'm working on list, and have not used "contemporary" yet, and don't want to. "Ambiguous" would not really be a classification, but more a lack thereof.

How 'bout: Blurry Neo-Grotesque?

Thanks!