Compiling constraint networks (CN) into multivalued decomposable decision graphs (MDDG)

cn2mddg is a compiler associating with a finite-domain constraint network represented in the XCSP 2.1 format an equivalent representation from the language MDDG of multivalued decomposable decision graphs. MDDG is precisely the extension to non-Boolean domains of the language of Decision-DNNF: it is based on decomposable AND-nodes and (multivalued) decision nodes. Similarly to Decision-DNNF, the MDDG language offers a number of tractable queries, including (possibly weighted) solution finding and counting, solution enumeration (solutions can be enumerated with polynomial delay), and optimization w.r.t. a linear objective function.