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Hierarchical XML-DOM Database for Mobile Applications

A three dimensional regular polyhedron based logical puzzle having a plurality of exposed faces with design indicia printed thereon includes a plurality of first and second pieces defined by at least four non-orthogonal planes extending through the puzzle. Each of the planes is parallel to at least a different one of the faces and extends through the geometric center of the puzzle to form the first pieces contiguous with an associated group of second pieces to define a cluster formed outwardly from a corresponding bisecting plane. The cluster is capable of rotational movement about non-orthogonal axes extending through the first pieces. Rotation of the clusters causes the second pieces to interchange positions with each other to locate exposed surfaces of the pieces on different faces of the polyhedron to achieve a desired design pattern solution thereon. Guide elements, tongue and groove locking mechanisms or magnet means are provided to retain the pieces together in interfitting relationship and allow for smooth sliding rotation of the clusters to interchange positions of the second pieces.