Rule configuration. The keys of the attribute set are the targets of the rules.
attribute set of (open submodule of attribute set of (boolean or signed integer or floating point number or string))
{ }
{ "Gimp" = { desktop = "^8"; state = "floating"; follow = true; }; "Kupfer.py" = { focus = true; }; "Screenkey" = { manage = false; }; }