There is a small classification chart in this article that I wrote for iLoveTypography. Perhaps it could hep a bit.

Hi Dösi,

in addition to Dan’s article (which omits the Kurrent genre, the script equivalent of Gebrochene Schriften – I suppose deliberately, as it never was significant in typography), there’s also the classification that Judith Schalansky uses in her Fraktur Mon Amour – basically a similar approach, with a finer differentiation of experimental (display) styles, see this overview PDF [3.8mb] by Fontblog.de.

As you speak German, see also the TypoWiki, Wolfgang Beinert’s Typolexikon, and this article by Bernhard Schnelle. Offline reading recommendation: Fraktur by Albert Kapr.

a guide out there that breaks up blackletter forms to it's very basic elements

Do you mean a list of form details like the Elefantenrüssel [‘elephant's trunk’]? I’m not aware of such a guide.
F

Totally unrelated: For some wierd reason I always thought that C of yours was a space helmet, Dan!

woha, thanks for your quick replies guys! The book "Fraktur" by Albert Kapr should be the thing I am searching for.

((Frode, have you seen Dan's C at his apartment recently?))

Hi Indra. I hope all is well. I didn’t remember the C, but wasn’t there an M?

See the C here.