Where did you get $selectexact and $fetchinto

[Das Goravani]

I just tried to look up $selectexact in both the Programming and Notation Manuals and it is in neither.  But I noticed it in someone’s code posted to me as an example and it looks like a very cool tool to have as select exact is often exactly what we’re doing. 

My question is where did you find out about such things if they’re not documented?

Are there more undocumented goodies lurking inside Omnis.  Is there a “Master's List” of such things?