Abstract
When a result is computed but it is considered as incorrect because it is not expected, we consider that we have a symptom (of error). The symptom may be a wrong answer or a missing answer. The role of diagnosis is to locate an error, that is a limited program fragment responsible for the symptom. The notions of symptom and error have a meaning only w.r.t. some notion of expected semantics. We consider only declarative semantics. The user does not need to understand the operational behaviour of the CLP system. Symptom and error are connected via some kind of tree and the diagnosis amounts to search for a kind of minimal symptom in this tree. Several search strategies are possible. The principles of an implementation are described, with a diagnosis session.
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Tessier, A., Ferrand, G. (2000). Declarative Diagnosis in the CLP Scheme. In: Deransart, P., Hermenegildo, M.V., Małuszynski, J. (eds) Analysis and Visualization Tools for Constraint Programming. Lecture Notes in Computer Science, vol 1870. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10722311_6
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DOI: https://doi.org/10.1007/10722311_6
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