| 摘要 |
An information processing apparatus, article of manufacture and method for discriminating between combined results of a plurality of elements. The apparatus includes: an assigning unit that assigns an element identification value to each of a plurality of basic elements, a generating unit that combines two or more basic elements, among the plurality of basic elements, so as to generate a combined element representing the two or more combined basic elements, and a calculating unit that merges, through an operation corresponding to an element combination method, a plurality of element identification values individually assigned to the plurality of basic elements contained in the combined element so as to calculate one element identification value for the combined element, where two elements are combined by an order-considered or ordered-ignored combination method, the calculating unit merges two corresponding element identification values through an operation where the commutative law holds or does not hold.
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