Abstract
The steady growth of the amount of data published on the World Wide Web has led to a number of attempts to provide effective Web querying, as a complement to conventional navigation techniques. In this paper, we propose to support WWW querying by specifying both logical and navigational aspects of a Web site through the unifying notion of schema. Schemata are a powerful tool for classifying and maintaining WWW data as well as for semantics-aware search on the Web. Moreover, schema availability is the basis for an effective flexible querying mechanism.
Following the style of such languages as Good and G-Log, the WG-Log language described in the paper uniformly represents site schemata, instances and queries as graphs. Gracefully supporting schemata that are huge or subject to change, WG-Log adequately represents data whose structure is less rigid than that of traditional databases; moreover, it allows for a uniform representation of flexible queries and views, the latter expressing customized access structures to the site information.
This work has been partially supported by the INTERDATA project from Italian Ministry of University and Scientific Research, 1997.
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Comai, S., Damiani, E., Posenato, R., Tanca, L. (1998). A schema-based approach to modeling and querying WWW data. In: Andreasen, T., Christiansen, H., Larsen, H.L. (eds) Flexible Query Answering Systems. FQAS 1998. Lecture Notes in Computer Science, vol 1495. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0055995
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