Abstract: Distributed systems and methods for allowing multiple users at separate workstations to collaboratively create and modify a geometric model of an object. According to embodiments, a system includes program code to generate the geometric model of an object at a first workstation and to store a first data representing the geometric model. The system also includes program code to transmit a duplicate copy and modification commands to a second workstation. The system also includes program code to receive a modified duplicate copy of the first data from the second workstation and to combine the first data and the modified duplicate copy of the first data to generate a modified geometric model of the object.

Abstract: A CAD system and corresponding method and computer program product. A method includes receiving a set of intersecting curves and receiving a selection of a source curve and a destination curve from the set of intersecting curves. The method includes receiving a selection intent rule and calculating a first chain of curves that includes the source curve, through the set of intersecting curves according to the selection intent rule. The method includes storing a selected path, the selected path being a chain of curves between the source curve and the destination curve with a minimum number of deviations from the selection intent rule.