#smwdoc is intended to provide user orientated documentation, not developer stuff :)
Resource modules have a group field which seems like the thing to use to get such info. Not sure if you can obtain all modules that have a certain group though.
In any case, I'm a bit skeptical about putting much effort into this, as the gain seems to be pretty small. Only a few people care about this info, so you can just as well document it by hand no?
Jeroen De Dauw
Don't panic. Don't be evil.