This layout is based off the colemak-se layout and features many tweaks to make working with Emacs and evil-mode more ergonomic. As with the colemak layout itself, the idea is to concentrate as much movement as possible to the home row.
To properly use the layout in Emacs, set Super to LGUI and Meta to RGUI. Unless you are running a permutation of the MacOS Swedish QWERTY-layout, modifiers will probably not work.