setContent method

The setContent method takes as its first arguement a String that has a description of "content name".

I see some examples in this forum where "ui" is used, and some where "html" is used.

I guessed at "html" and it seems to work for my span widget BUT that was only after trying all kinds of other things.

Is there someplace in the reference material that enumerates what the "content name" values might be and when each would be used.

Frank Gualtieri