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Lecture Notes in Computer Science
We describe the design of the OLPS system, an implementation of the preferred answer set semantics for ordered logic programs. The basic algorithm we propose computes the extended answer sets of a simple program using an intuitive 9-valued lattice, called T9. During the computation, this lattice is employed to keep track of the status of the literals and the rules while evolving to a solution. It turns out that the basic algorithm needs little modification in order to be able to compute thedoi:10.1007/978-3-540-30557-6_11 fatcat:4bvzusubvvcajczsnfld3gv3gy