G.O. Arocena, A.O. Mendelzon, G.A. Mihaila, "Applications of a Web query language," Proc. 6th International World Wide Web Conference, 1997.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....these data sources. In this way, the 12 data dictates the structure of the ontology rather than the other way around. Querying the Web is such an important problem that a diverse body of research has be directed towards it. Some projects focus on creating query languages for the Web [1, 21], but these approaches are limited to queries concerning the HTML structure of the documentandthehypertext links. They also rely on index servers suchasAltaVista or Lycos to searchforwords or phrases, and thus suffer from the limitations of keyword search. Work on semistructured databases [27] is ....

G. Arocena, A. Mendelzon and G. Mihaila, Applications of a Web Query Language, in: Proceedings of ACM PODS Conference Tuscon, AZ (1997).

....different axis: i) between one pass and multi pass algorithms, ii) between deterministic and randomized algorithms, and (iii) between exact and approximation algorithms. We first describe some classes of problems which can be described in this context. 1) Systems such as LORE[MAGQW] and WEBSQL [AMM, MM, MMM] view a database as a graph hypergraph. For instance, a directed edge might represent a hyperlink on the web, or a citation between scientific papers, or a pair of cities connected by a flight; in a database of airline passengers a hyperedge may relate a passenger, the airports he uses, and the ....

G. Arocena, A. Mendelzon, G. Mihaila. Applications of a Web Query language. Proceedings of the 6th International WWW Conference, 1997.

....of representing both database and Web data structures. It is first introduced in the TSIMMIS project. A similar model, developed at the University of Pennsylvania, is described in [5, 4] These models provide a valuable core of ideas for applying database concepts to Web data. Toronto s WebSQL [2] is a declarative query language for extracting information from the Web. The emphasis is to combine query with controlled automated navigation. Technion s WWW Query System (W3QS) 14, 15, 21] views the WWW as an ultra large database and uses W3QL, a high level SQL like query language, to query ....

G.O. Arocena, A.O. Mendelzohn, and G.A. Mihaila. Applications of a Web Query Language, in: Proceedings of WWW6, Santa Clara, California, 1997, http://atlanta.cs.nchu.edu.tw/www/PAPER267.html More information can be found at WebSQL's home page, http://www.cs.toronto.edu/ websql/

....to include them in this discussion. For some other systems (such as XWrap [20] which is essentially tree based like W4F or Lixto) no formal specifications have been published which can be made subject to expressiveness evaluations. Web query languages were also evaluated, but some (e.g. WebSQL [4], WebLOG [19] are unsuited for wrapping because they cannot access the structure of Web documents, and others (e.g. WebOQL [3] for a survey of further Web query languages see [14] are highly expressive query languages that permit data transformations not in the spirit of wrapping. 6.1 Regular ....

G. Arocena, A. Mendelzon, and G. Mihaila. "Applications of a Web Query Language". In Proceedings of the 6th International WWW Conference, Santa Clara, California, Apr. 1997.

....each page is converted into a set of database relations according to the same schema. This work is influenced by WebSQL, a language that allows queries about hyperlink paths among Web pages, with limited access to the text and internal structure of pages and URLs [Mihaila 1996, Mendelzon 1997, Arocena 1997]. In the default configuration, hyperlinks are divided into three categories, internal links (within a page) local links (within a site) and global links. It is also possible to define new link types based on anchor text; for example, links with anchor text next . All of these facilities can be ....

Gustavo O. Arocena, Alberto O. Mendelzon, and George A. Mihaila. Applications of a Web Query Language. In Proceedings of the Sixth International World Wide Web Conference, Santa Cruz, CA, April 1997.

....classifying that huge number of pages goes beyond human capacity. There are other efforts that involve Boolean queries, proximity queries and several other advanced algorithms used in information retrieval [14, 15] Web query systems have been very popular during the past years. Systems like WebSQL[1], WOQL[2] 3] WebSSQL [4] and WebLog[5] retrieve information from the World Wide Web. WebSQL, for instance, is a high level declarative query language for extracting information from the Web, it is written in Java, so the queries can be embedded into Java programs; however, our system uses ....

G. Arocena, A. Mendelzon and G. Mihaila. Applications of a Web Query language, Proceedings of the 6th International WWW Conference, Santa Clara, California, April 1997. HTML version

....the mode selection and destination patterns of an itinerary that a route will seek to optimize can be speci ed by a formal language. The problem of nding label constrained paths also arises in other application areas such as production distribution network, VLSI Design, Databases queries [MW95, AMM97], etc. Here, we study the problem of nding shortest simple paths in a network subject to certain formal language constraints on the labels of the paths obtained. We illustrate the type of problems studied here by discussing prototypical application areas: 1.1. Intermodal Route Planning. Our ....

....the topology of the document network. For example as pointed out in [Ha88] Content search ignores the structure of a hypermedia network. In contrast, structure search speci cally examines the hypermedia structure for subnetworks that match a given pattern. We refer the reader to the work of [MW95, AMM97, Ha88] for a more thorough discussion on this topic. A recent paper by Abiteboul and Vianu [AV99] also discusses how regular expression constrained path queries can be used to query the web. The following example is essentially from [AMM97] Example 2: Let G be a graph describing a hypertext document. ....

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G. Arocena, A. Mendelzon, G. Mihaila, Applications of a Web Query Language, Proc.6th Int'l. WWW Conf., Santa Clara, April 1997.

....is based on the notion of view in the traditional database; data from existing Web sites are extracted, integrated and restructured to be presented in different perspectives. They restrict end users to access to the server that defines the static view. Other works propose query languages [3, 5, 6] for manipulating the Web in the database style. However, it is too complicate for end users to learn and use them directly. The research on the design of a system architecture and tools for end users (especially for mobile end users) to create a new client application to integrate the WISs is not ....

G. O. Arocena and A. O. Mendelzon: "Applications of a Web Query Language." In Proceedings of the 6th International WWW Conference, Santa Clara, California, April 1997.

....LDAP directory. We build upon the works of [21] and [22] and devise stack based and merging style algorithms for a much larger class of queries for the directory data model. The directory data model shares the flexibility of the graph based models (see, e.g. GraphLog [14] Hy [13] and WebSQL [4]) and the recently proposed models for semi structured data (see, e.g. Lorel [1] and UnQL [8] while at the same time effectively addressing the specific needs of network directory applications. The specific restrictions we impose, such as the hierarchical namespace, are typical in the ....

G. Arocena, A. Mendelzon, and G. Mihaila. Applications of a web query language. In Proceedings of 6th International WWW Conference, Santa Clara, CA, 1997.

....engines, McBryan s World Wide Web Worm [40] it is also used in [8, 11, 10] Another direction of work on the integration of links into www search is the construction of search formalisms capable of handling queries that involve predicates over both text and links. Arocena, Mendelzon, and Mihaila [1] have developed a framework supporting www queries that combines standard keywords with conditions on the surrounding link structure. Clustering of Link Structures Link based clustering in the context of bibliometrics, hypertext, and the www has focused largely on the problem of decomposing an ....

G.O. Arocena, A.O. Mendelzon, G.A. Mihaila, "Applications of a Web query language," Proc. 6th International World Wide Web Conference, 1997.

....in the form of a database object. This is in contrast to ParaSite, where each page is converted into a set of database relations according to the same schema. WebSQL allows queries about hyperlink paths among web pages, with limited access to the text and internal structure of web pages and URLs [4, 25, 23]. In the default configuration, hyperlinks are divided into three categories, internal links (within a page) local links (within a site) and global links. It is also possible to define new link types based on anchor text; for example, links with anchor text next . All of these facilities can be ....

Gustavo O. Arocena, Alberto O. Mendelzon, and George A. Mihaila. Applications of a web query language. In Proceedings of the Sixth International World Wide Web Conference,Santa Cruz, CA, April 1997.

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G. O. Arocena, A. O. Mendelzon, and G. A. Mihaila. Applications of a web query language. In Proceedings of the Sixth International World Wide Web Conference [WWW6], pages 587-- 595.

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G.O. Arocena, A.O. Mendelzon, G.A. Mihaila, "Applications of a Web query language," Proc. 6th International World Wide Web Conference, 1997.

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Arocena, G.O., Mendelzon, A.O., Mihaila, G.A. 1997. \Applications of a Web Query Language", In 6th Int. WWW Conf., April, Available at http://atlanta.cs.nchu.edu.tw/www/PAPER267.html.

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G. Arocena, A. Mendelzon, and G. Mihaila. Applications of a Web query language. In Proceedings of the 6th International World Wide Web Conference (WWW6), pages 1305--1315, Santa Clara, CA, 1997.

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G. O. Arocena, A. O. Mendelzon, and G. A. Mihaila. Applications of a Web query language. Proc. 6th WWW Conf., 1997.

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Arocena, G.O., Mendelzon, A.O., Mihaila, G.A. 1997. \Applications of a Web Query Language", In 6th Int. WWW Conf., April, Available at http://atlanta.cs.nchu.edu.tw/www/PAPER267.html.

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Gustavo O. Arocena, Alberto O. Mendelzon, and George A. Mihaila. Applications of a Web Query Language. In Proceedings of the 6th International WWW Conference, Santa Clara, California, 1997.

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G. Arocena, A. Mendelzon, and G. Mihaila, "Application of a Web Query Language," Computer Networks and ISDN Systems, vol. 29, no. 8-13, Sept. 1997, pp. 1305-1315.

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Arocena, G.O., Mendelzon, A.O., & Mihaila, G.A. (1997). Applications of a Web query language. Proc. of the 6 th International WWW Conference, 587--595.

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AROCENA,G.O.,MENDELZON,A.O.,AND MIHAILA, G. A. 1997. Applications of a Web query language. In Proceedings of the 6th International World Wide Web Conference (Santa Clara, Calif., Apr. 7--11).

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G. O. Arocena, A. O. Mendelzon, and G. A. Mihaila. Applications of a web query language. In Proceedings of the Sixth International World Wide Web Conference [WWW6], pages 587{ 595.

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Gustavo O. Arocena, et al. Applications of a Web Query Language.

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Gustavo O. Arocena, Alberto O. Mendelzon, and George A. Mihaila. Applications of a Web query language. In Proceedings of the Sixth International World Wide Web Conference, Santa Cruz, CA, April 1997.

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G.O. Arocena, A.O. Mendelzon, G.A. Mihaila, Applications of a Web query language, Proc. 6th International World Wide Web Conference, 1997.

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