Declarative bias in Atris rule induction shell

The paper presents Atris rule induction shell in the light of its declarative biases. Atris was developed to enable simple use of different combinatorial optimisation algorithms and noise-handling mechanisms, to enable simple ``cross validation'' experiments, experiments with different attributes considered as class and different attribute subsets used for learning. Atris currently incorporates seven local optimisation algorithms and four heuristic estimates, enables use of simple built-in background knowledge, use of pruning parameters and validation of the induced hypothesis.