Final appearance of page comes from negotiation between author and viewer, via solving all the constraints. Incremental constraint satisfier, module compiler, construction-set style user interface, many tools, extensible set of primitive user interface building blocks. We propose a new way to form virtual worlds based on geometric modeling constraints and higher-level modeling abstractions. The Constraint Imperative Programming CIP family of languages integrates constraints and imperative, object oriented programming. Besides merging useful features of both paradigms, such integration has synergistic effects.
Constraints provide a useful mechanism to maintain relations in user interface toolkits.
Garnet is a widely used user interface toolkit with high functionality, based on one way, required constraints. In the last 20 years, many algorithms and heuristics were developed to find solutions in constraint networks. Their number increased so much that it quickly became vital to compare performance to propose a small number of good methods. Constraints as a general computational technique allow declaring a set of relationships between entities. A constraint satisfaction system is employed to automatically ensure that the relationships hold under changing conditions.