Hi Kent,
I'm not familiar with STL. This is coded from scratch. Up to this demo the code was straight procedural but I have reached the stage where further encapsulation is desirable and thus begins the process of collecting functions together into classes.
Not sure there is an ideal data system to fit all needs. For instance in low level data processing using SQL would be very inefficient and you would use hard coded data structures instead or hold the data in arrays of strings.
Charles