Donald F. Geddis, Michael R. Genesereth, Arthur M. Keller, and Narinder P. Singh. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95, Baltimore, MD, December 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....the proper context, it is important to provide a broad classification of the prior work on information integration. Information integration (aka data integration) has received a significant amount of attention in the recent years, and several systems have been developed. These include InfoMaster [21], Information Manifold [33] Garlic [22] TSIMMIS [20] HERMES [3] and DISCO [1] The similarities and differences among these systems can be broadly understood in terms of (1) the approach used to relate the mediator and source schemas and (2) the type of application scenario considered by the ....

....scenario, the set of data sources may be changing, and more often than not, the mediation may not have been explicitly authorized by the sources. Systems such as Garlic [22] TSIMMIS [20] HERMES [3] and DISCO [1] can be characterized as aiming at authorized database integration, while InfoMaster [21], Information Manifold [33] Occam [27] Razor [18] as well as the Emerac system presented in this paper address the information gathering scenario. Although related in many ways, authorized database integration and information gathering systems do differ in two important ways the way source and ....

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Donald F. Geddis, Michael R. Genesereth, Arthur M. Keller, and Narinder P. Singh. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95, Baltimore, MD, December 1995.

.... KHL 94, RIS 94, MS94, Lan95, YG95, Moc96, MRK97, MRK 97] electronic mail [Mye80, MGT 87, Pol88, GNOT92, Ter91, Ter93, LMM94] books [Ric79b, MR98] application program know how [LN98] the finding of experts [SW93, KSS96] Web pages [RM96, HT96, Bal97, THA 97, PB97, RP97, Bie98] classified ads [GGKS95] movies [Kay95, HRF95, AKK97, AKK98] music [Sha94, SM95, Loe92] and TV [EHWS96, DtHh98, Bau96] In Chapter 2, we will discuss some of them in more detail. Figure 2a shows the general architecture of IF systems, as proposed by Belkin and Croft [BC92] The diagram consists of three blocks, ....

D.F. Geddis, M.R. Genesereth, A.M. Keller, and N.P. Sigh. Infomaster: a virtual information system. In Proceedings of the CIKM 95 Workshop of Intelligent Information Agents, Baltimore, Maryland, 1995.

....and publishing of multimedia medical cases [7] All the proposed agents were developed using JAMES [8] a Java implementation of a KQML speaking agent model. 4. Discussion The agent approach in the integration of heterogeneous information sources has been proposed by Genesereth et al. since 1995 [9,10]; a system called Infomaster was presented, that creates a virtual data warehouse accessing distributed heterogeneous information sources on the Internet. The Infomaster architecture consists of a single centralized facilitator that deals with requests coming from the WWW as well as from other ....

D.F. Geddis, M.R. Genesereth, A.M. Keller and N.P. Singh, "Infomaster: A Virtual Information System", Intelligent Information Agents Workshop at CIKM'95, December 1995.

....service specifications at the KQML level. Name Service Information as a Layer under KQML. A second approach factors out the name service information from the speech act information, allowing the address information to be handled independently by an underlying transport layer. Classic KQML [8, 9] facilitates this, by factoring out the routing information from the contextual and content information about the speech act being sent. The benefits of this representation are illustrated, for example, in the exchange of nomadic transactions, where the content of a message may be a set of nested ....

D. Geddis, M. Genesereth, A. Keller, and N. Singh. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95, 1995.

....of these sites allow users to perform keyword searches on the ads (Seattle Times PI 1996) Some have their ads nicely categorized, making it easier to find ones of interest (ADWorld 1996) Other sites have more advanced searching capabilities. For example, Stanford s Infomaster (Infomaster 1995) (Geddis et al. 1995) allows users to fill out a form that precisely describes the kind of apartment they are looking for. Infomaster searches the ad databases of several local newspapers and returns those which describe apartments that match the user s specification. These classified ad sites all provide tools to ....

Geddis, D., Genesereth, M., Keller, A., and Singh., N. 1995. "Infomaster: A Virtual Information System". In Proceedings of CIKM 95 Workshop on Intelligent Information Agents. Baltimore, Maryland.

....American Association for Artificial Intelligence (www.aaai.org) All rights reserved. The number of possible user queries is restricted, and adding new information sources requires rewriting all related query templates. The Information Manifold (Kirk et al. 1995) and the Infomaster project (Geddis et al. 1995) follow the more flexible source centric approach. This approach is very well suited for dynamic environments like the Internet, because adding, removing, or changing an information source only requires adding, removing, or changing the description of this respective information source. Because ....

....can do in describing the information sources is to state that the data they store is contained in the cars for sale relation. 2 Because frequently site relations do not correspond to materialized views in terms of the world relations, implementations of information brokers (Kirk et al. 1995; Geddis et al. 1995) consider the data stored by an information source to be contained in the corresponding view. Using this interpretation, however, an information broker might be forced to retrieve much redundant information. If several information sources store data that might be relevant to a user query, then all ....

Geddis, D. F.; Genesereth, M. R.; Keller, A. M.; and Singh, N. P. 1995. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95.

....of dynamically appearing and continually changing information sources. Its current Java implementation provides for agent portability across several platforms. We note in passing that there exist many other information centric agent systems. SIMS [AKS96] Warren Retsina [DSW96, DS97] Infomaster [GGKS95], TSIMMIS [GPQR 95] and DISCO [TRV95] all to some MCC Technical Report MCC INSL 096 98 5 degree are information centric agent systems. The designers and implementers of these systems have also addressed some of the issues that we discuss in this paper. A Layered Infrastructure The operation ....

D. Geddis, M. Genessereth, A. Keller and N. Singh, "Infomaster: a virtual information system". In ACM CIKM Intelligent Information Agents Workshop, 1995. MCC Technical Report MCC-INSL-096-98 22

....system organization. Most contain agents which wrap resources, matchmaking services of varying degrees of MCC INSL 114 98 Agent Ontologies Semantic Query Subscriptions Event System Brokering Processing Detection ARPI [PTMM97] p simple OOA [MOMC97] p p SIMS [AKS96] p complex Infomaster [GGKS95] complex InfoSleuth p p complex p p Table 3: Agent and agent like information gathering systems, and their comparative functionality. complexity, middleware agents to access and combine information, and user agents which interact with the user and maintain information about their preferences ....

D. Geddis, M. Genessereth, A. Keller, and N. Singh. Infomaster: a virtual information system. In Proc. ACM CIKM Intelligent Information Agents Workshop, 1995.

....service specifications at the KQML level. Name Service Information as a Layer under KQML. A second approach factors out the name service information from the speech act information, allowing the address information to be handled independently by an underlying transport layer. Classic KQML [8, 9] facilitates this, by factoring out the :sender and :receiver envelope information from the contextual and content information about the speech act being sent. The benefits of this representation are illustrated, for example, in the exchange of nomadic transactions, where the content of a ....

D. Geddis, M. Genesereth, A. Keller, and N. Singh. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95, 1995.

....systems that provide a uniform query interface to multiple information sources (e.g. Internet Softbot [ Etzioni and Weld, 1994 ] Part of this work was done while this author was visiting AT T Bell Laboratories. SIMS [ Arens et al. 1996 ] TSIMMIS [ Chawathe et al. 1994 ] Infomaster [ Geddis et al. 1995 ] HERMES [ Subrahmanian et al. 1995 ] Nomenclator [ Ordille and Miller, 1993 ] In such a system the user expresses what he or she wants, and the system determines which information sources are relevant to the query using descriptions of the sources available to the system. The system ....

....sources because we do not have to modify the query specific procedures. In the AI community several systems have been developed based on explicit representations of the contents of information sources (e.g. Internet Softbot [ Etzioni and Weld, 1994 ] SIMS [ Arens et al. 1996 ] InfoMaster [ Geddis et al. 1995 ] SIMS requires every information source to map to a class in the description logic system LOOM [ MacGregor, 1988 ] However, instead of taking advantage of the reasoning services of LOOM, SIMS selects the relevant sources using a set of transformation rules. These rules correspond to sound ....

Geddis, D.; Genesereth, M.; Keller, A.; and Singh, N. 1995. Infomaster: a virtual information system. In CIKM workshop in intelligent information agents.

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Donald F. Geddis, Michael R. Genesereth, Arthur M. Keller, and Narinder P. Singh. Infomaster: A virtual information system. In Intelligent Information Agents Workshop at CIKM '95, Baltimore, MD, December 1995.

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Donald F. Geddis, Michael R. Genesereth, Arthur M. Keller and Narinder P. Singh, "Infomaster: A Virtual Information System,"; Intelligent Information Agents Workshop, at CIKM '95, December 1995.

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Donald F. Geddis, Michael R. Genesereth, Arthur M. Keller, and Narinder P. Singh, "Infomaster: A Virtual Information System," Intelligent Information Agents Workshop, at CIKM '95, December 1995.

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D. Geddis, M. Genessereth, A. Keller, and N. Singh. InfoMaster: a virtual information system. In Proceedings of the ACM CIKM Intelligent Information Agents Workshop, 1995.

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