(okay, upon further googling, it's this.
This was helpful to me at the time, but now I have a more specific situation.
Imagine you've got about 100 'people' in a community. They have the ability to use magic (as in, healing scrapes and cuts, small feats of telekinesis, and (for lack of a better word) some types of transfiguration). They can go two or three days without eating, easily, so their food needs are lower than normal humans. They don't cultivate anything; they get all the food they need from the forest around them. Their clothing is a mixture of animal skins and what would correspond to linen - they've got the technology for weaving, but they also use furs and leather. Children are uncommon; maybe one or two a year.
So... what am I looking at in terms of specialization? I'm assuming that those who are specialized (say, someone corresponding to a doctor) would normally spend most of their time acting as any other member of the community. Meaning my imaginary doctor wouldn't sit around waiting for sick people.
If it helps any, the setting corresponds to the early 1800's, however, the people in this community don't interact with the outside world very much.
I have this sinking feeling that this is confusing, but if it is, just ask a few questions and I'll be happy to help.
ETA: I love this community. Thanks guys :D