Constraint based and object oriented techniques are used to build an end-user programmable design editor that maintains spatial and other kinds of relationships.

researchers: Mark D Gross

publications:
• 1996 Elements that Follow Your Rules: Constraint Based CAD layout
• 1992 Graphical Constraints in CoDraw
• 1991 Grids in Design and CAD
• 1991 Constraint Based Design Environments for Architecture and Engineering
• 1990 Relational Modeling
• 1987 Designing With Constraints
• 1987 Design and Use of a Constraint-Based Laboratory for Learning Design
• 1986 Design as Exploring Constraints