F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Proc. 5th Int. Conf. on Deductive and Object-Oriented Databases (DOOD97), December 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....searches using a conventional search engine. In addition to similar query capabilities, Web3QL offers an elementary graph pattern search facility, allowing users to search for simple paths in the graph representing the navigational structure of a Web site. Finally, WebLog (and similar languages [GMP97] propose an O O instance representation technique which leads to a complete deductive query language; but again it lacks any representation of data semantics. In other approaches, a representation of semantics is computed as an afterthought from the data instance. The Tsimmis system [GMPQ ....

F. Giannotti, G. Manco, and D. Pedreschi. A deductive data model for representing and querying semistructured data. In Proceedings of the ILCP 97 Post-Conference Workshop on Logic Programming Tools for Internet Applications, Leuwen, 1997.

....stands in the choice of the data model: all of these proposals adopt variants of a simple graph based data model, and concentrate on the development of query languages for these structures. Moreover, there is no notion of scheme similar to the one of Araneus. Other proposals WebLog [43] ADOOD [36] and FLORID [39] advocate the use of logic as a formalism for querying the Web. A notion of scheme similar to the one introduced in Araneus has been recently used in WGLog [32] whose aim is at studying graph based query languages for the Web, and in WAG [28] which also studies mining and ....

F. Giannotti, G. Manco, and D. Pedreschi. A deductive data model for representing and querying semistructured data. In Proceedings of the Workshop on Logic Programming Tools for Internet Applications (in conjunction with ICLP'97), Leuven, July 11, 1997 http://http://clement.info.- umoncton.ca/%7Elpnet/proceedings97/, 1997.

....searches using a conventional search engine. In addition to similar query capabilities, Web3QL offers an elementary graph pattern search facility, allowing users to search for simple paths in the graph representing the navigational structure of a Web site. Finally, WebLog (and its enhancements, [Gia97]) propose an O O instance representation technique which leads to a powerful deductive query language, fully equipped with recursion; but again it lacks any representation of data semantics. ffl Instance based semantics representation Nowadays it is widely recognized that to effectively build ....

Giannotti F., Manco G., Pedreschi L. " A Deductive Data Model for Representing and Querying Semistructured Data". Proc. of the ILCP 97 Post-Conference Workshop on Logic Programming Tools for Internet Applications, Leuwen (Nelgium) 1997

....there is no language integrating Web access with a clear and declarative semantics. Moreover, object oriented modeling of data, which has proven useful for various tasks when managing Web documents, is not directly supported by languages in the style of Prolog or Datalog. In contrast, ADOOD [GMP97, GMNP97] and WebLog [LSS96] add object orientation to logic based Web management. However, WebLog has not been implemented (yet) moreover, both languages do not provide a formal semantics for the actual Web access. In this paper we present some experiences in designing Web applications with ....

F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Bosschere et al. [BHT97]. in conjunction with ICLP'97, Belgium, http://clement.info.umoncton.ca/~lpnet/iclp97.

....access them. However, it seems to us that most of the advantages of IM rely on the fact that information sources are structured. This is quite different to querying the web that is highly unstructured. The integrated active deductive object oriented data model (ADOOD) of Gianotti and Manco [7] seems more suitable to handle poorly structured information. Visualization. The activity of the softbot could be monitored by the Hy visualization system of Hasan et al. 8] Abductive procedures for normal abductive programs. The representation language employed in this paper is ....

F. Giannotti and G. Manco. A deductive data model for representing and querying semistructured data. In Proceedings 2nd International Workshop on Logic Programming Tools for Internet Applications, in conjunction with ICLP-97, 1997.

....reasoning, by means of the nondeterministic choice construct [8] Datalog , which is essentially a fragment of LDL [2] and is advocated in [20, Chap. 10] revealed a highly expressive language, with applications in diverse areas such as AI planning [4] active rules [18] object databases [7], semistructured information management and Web restructuring [7] However, we are still missing a thorough study of the semantics of Datalog , which will provide a basis to sound and ecient implementations and optimization techniques. A preliminary study of the semantics for a generalization of ....

....[8] Datalog , which is essentially a fragment of LDL [2] and is advocated in [20, Chap. 10] revealed a highly expressive language, with applications in diverse areas such as AI planning [4] active rules [18] object databases [7] semistructured information management and Web restructuring [7]. However, we are still missing a thorough study of the semantics of Datalog , which will provide a basis to sound and ecient implementations and optimization techniques. A preliminary study of the semantics for a generalization of Datalog is sketched in [4] but their approach presents some ....

[Article contains additional citation context not shown here]

F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Proc. 5th Int. Conf. on Deductive and Object-Oriented Databases (DOOD97), December 1997.

....Datalog , which is essentially a fragment of LDL [2] and is advocated in [27, Chap. 10] revealed a highly expressive language, with applications in diverse areas such as AI planning [4] active databases [25] object databases [8] semistructured information management and Web restructuring [10], data mining and knowledge discovery in databases [15, 3, 11] However, a thorough study of the semantics of Datalog is still missing, which provides a basis to sound and efficient implementations and optimization techniques. A preliminary study of the semantics of Datalog is sketched in [4] ....

.... with temporal reasoning, as the progression of time points yields an obvious stratification of programs consider for instance Datalog 1S [5] It is therefore natural that non monotonic and temporal reasoning are combined in several deductive database languages, such as those in [18] 16] [10], 27, Chap. 10] However, a striking mismatch is apparent between the above two lines of research: nondeterminism leads to a multiplicity of (stable) models, whereas stratification leads to a unique (perfect) model. So far, no comprehensive study has addressed the combination of the two lines, ....

[Article contains additional citation context not shown here]

F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Proc. of the 2nd Int. Workshop on Logic Programming Tools for Internet Applications, July 1997.

....reasoning, by means of the nondeterministic choice construct [8] Datalog , which is essentially a fragment of LDL [2] and is advocated in [20, Chap. 10] revealed a highly expressive language, with applications in diverse areas such as AI planning [4] active rules [18] object databases [7], semistructured information management and Web restructuring [7] However, we are still missing a thorough study of the semantics of Datalog , which will provide a basis to sound and efficient implementations and optimization techniques. A preliminary study of the semantics for a generalization ....

....[8] Datalog , which is essentially a fragment of LDL [2] and is advocated in [20, Chap. 10] revealed a highly expressive language, with applications in diverse areas such as AI planning [4] active rules [18] object databases [7] semistructured information management and Web restructuring [7]. However, we are still missing a thorough study of the semantics of Datalog , which will provide a basis to sound and efficient implementations and optimization techniques. A preliminary study of the semantics for a generalization of Datalog is sketched in [4] but their approach presents some ....

[Article contains additional citation context not shown here]

F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Proc. 5th Int. Conf. on Deductive and Object-Oriented Databases (DOOD97), December 1997.

....the management of semistructured information, such as that available on the web. In particular, we point out how the mechanisms of ADOOD allow querying and restructuring web information, exploiting user s partial knowledge on data structure, and dealing with the dynamic nature of web information [14, 11]. 2 Background on Non Determinism and XY stratification In this paper, we use stable model semantics of Datalog: programs, a concept originating from autoepistemic logic, which was applied to the study of negation in Horn clause languages by Gelfond and Lifschitz [9] To define the notion of a ....

F. Giannotti, G. Manco, and D. Pedreschi. A Deductive Data Model for Representing and Querying Semistructured Data. In Proceedings of the Second International Workshop on Logic Programming Tools for Internet Applications, July 1997. To appear.

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