@PolyGeo - are theoretical questions discouraged because they may have long answers ?

@gansub The question you deleted appeared to be along the lines of “I would like to participate in a discussion about GIS Design Patterns" - I recommend reviewing gis.stackexchange.com/help/dont-ask

@PolyGeo - not quite. I was trying to get a real world example of an application that had been implemented using GIS Design patterns.