JSR-331 “Java Constraint Programming API” is currently in the Early Draft Review state. A new revised version 0.6.1 of the JSR-331 Specification has been made available on July 30, 2010 and everybody may review it:
– specification document
This version addresses concerns and constructive suggestions expressed by many CP experts and vendors about a previous version. Your comments are very welcome. Preliminary JSR-331 implementations with two open source CP solvers are also available upon requests.