Picking

Previous to the implementation of the EDG functionality, picking within the graphics view had a limited scope, in that it was a means to navigate to an element in the database or a way of identifying and returning some key features on an item in the graphics, that means, ppoints or plines.

What EDG allows now is a richer set of functions that allow you to specify the type of pick you can perform, which can have predefined criteria applied to you and richer set of return information that you can use without having to derive the information within your own application code.