Michael J. Minock and Wesley W. Chu. Explanation for cooperative information systems. In Proceedings of the Ninth International Symposium on Methogologies for Intelligent Systems, June 1996.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....information, regardless of its information content, there is no need to go back and relax a query after a failure. A failure of a query, given our broad definition of answer, means there is nothing relevant to the query known by an answering agent. CoBase [Chu et al. 1994, Chu et al. 1996, Minock and Chu, 1996] is a cooperative database system that makes query relaxation, generalization, and specialization available to a user. As part of this effort, the query language CSQL has been developed. CSQL interacts with a type abstraction hierarchy that contains general domain knowledge at the top level and ....

Michael J. Minock and Wesley W. Chu. Explanation for cooperative information systems. In Proceedings of the Ninth International Symposium on Methogologies for Intelligent Systems, June 1996.

....Poland, pankowsksol.put.poznan.pl Abstract. In the paper, we discuss the problem of approximate answers to queries in cooperative database systems (CDBS) CDBS give approximate answers when exact answers are empty or unavailable, and provide summary answers when answer sets are too large [6]. An approximate answer is an answer corresponding to a relaxed version of the query. The relaxation is obtained by means of replacement of equality relation by a partial ordering relation (in child semantics ) or by partial pre ordering relation (in neighbor semantics ) The other type of ....

Minock M.J., Chu W.W., Explanation for Cooperative Information Systems, Foundation of intelligent Systems, (eds.: Z.W. Rag, M. Michalewicz), Lecture Notes in Artificial Intelligence 1079, 1996, pp. 264- 273.

....objects, databases 1. Introduction in conventional databases, a query written in a formal query language is accepted, evaluated against a database, and the complete set of data satisfying the query (the answer set) is returned. in some systems, however, e.g. in cooperative database systems [8,9,10,12,15], or in multilevel database [4,10] this query answer paradigm is augmented to allow the system to relax a query (e.g. when a query fails or if access privileges of the user are too low) Then an approximate answer may be provided. Relaxation of a query may consist in rewriting it into a set of ....

....or a finite set of object identifiers. A set O of labeled objects is consistent if for every identifier occurring in O there is a labeled object in O with this identifier. Example 1. The following set of labeled objects is consistent: 1 Store [2,3] 4 Part [6, 7] 5 Part CDx34 9 Address [11, 12] 11 City Poznafi 12 Street Chopin 10 Parts 13 13 Part wheel in the above example, 3, Parts, 4, 5 ) is a set labeled object (or a disjunctive 1 abeled object) its state enumerates references to objects being components of the o bject. The labeled object (4, Part, 6, 7] is a tuple ....

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Minock M.J., Chu W.W., Explanation for Cooperative Information Systems, Foundation oflntelligent Systems, (eds.: Z.W. Ra, M. Michalewicz), Lecture Notes in Artificial Intelligence 1079, 1996, pp. 264-273.

....only summarizing its work once it has completed. Another extreme is the system running in detail, explaining each action, giving the user the ability to monitor progress. Explanations should also be tailored to a user s understanding of the system. We have developed an explanation mediator [20] to serve these purposes. COBASE: A SCALABLE AND EXTENSIBLE COOPERATIVE INFORMATION SYSTEM 25 Concept Instance Explanation Request Subgoal Communication Action invocation communication rhetorical syntactic lexical Explanation Request Explanation Reply Information Access Generation Rules ....

M. Minock and W.W. Chu. Explanation for cooperative information systems. In Proceedings of the Ninth International Symposium on Methodologies for Intelligent Systems, Baltimore, MD, 1996.

....(KB) There is a TAH directory storing the characteristics of all the TAHs in the system. When CoBase asks queries, it asks the underlying database systems. When an approximate answer is returned, the user can ask for an explanation of how the answer was derived or an annotated relaxation path (Minock Chu 1999). A context based semantic nearness will be provided to Knowledge Bases CoBase Engine Data Sources Explanation System User Geographical Information System Database Database Association Relaxation Relaxation Control Knowledge Editor User Profile Query Cases TAHs GUI TAH Manager Explanation Rules ....

....Figure 8. More importantly, it allows a user to ask complex queries by the simple point and click method. The GUI for the explanation supports a hypertext like browser for explanation. It allows users to interactively ask for more definition, elaboration, justification, or simply summarization (Minock Chu 1999). Performance Evaluation We have measured the CoBase performance based on the execution of a set of queries on the CoBase testbed developed at UCLA for the ARPI transportation domain. The performance measure includes response time for query relaxation and explanation (Chu et al. 1996) and the ....

Minock, M., and Chu, W. 1999. Explanation for cooperative information systems. In Proceedings of the Ninth International Symposium on Methodologies for Intelligent Systems.

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