Some of the stuff you can derive from the GT library documentation and some of it you can figure out by reading the source code. In general I have found this to be true:

Dbsql::HTML::func

Where Dbsql is the directory Dbsql.

Where HTML is the file name where the functions reside.

Where func is the function name within the preceding filename.

That solves some of your questions but YES! I do agree a good description of functions and shorthand would be very nice, e.g. pk, sdb, and q?