The area "Logic-Based
Databases" deals with all aspects of databases that are influenced by logic and,
therefore, it does not coincide with deductive databases and DATALOG for it is involved
with many other issues as well. To stress this pervasive nature of the area, the news
features the reports on two very popular topics which cannot be conveyed into the
deductive database mainstreams: WEB data management and spatial databases.
In the first report, Giansalvatore
Mecca discusses some stimulating research issues in WEB data
management, particularly the evolution of database technology to cope with semistructured
data such as the ones handled by WEB. The role of logic in this framework is promising
both for modelling and querying data. It is interesting to mention that Mecca, together
with other scientists, is organizing an International Workshop on the Web and Databases
(WebDB'98), to be held in conjunction with EBDT'98 in Valencia, Spain, March 27--28, 1998.
The topics of interest are: data models for the Web, query languages and systems for Web
data, semi-structured data management and the Web, management of Web documents, finding
structure in Web information, data integration over the Web, warehousing of Web data,
data-intensive applications on the Web, methodologies and tools for Web data publishing,
mining, exploring and visualizing the Web, transactions on the Web, security and integrity
issues. The deadline for submission will be probably passed when this news will appear but
there will be still time to attend the workshop.
Jan Paradaens' report describes the
main aspects of spatial databases and their relationships with computational geometry,
computational logic, and constraint databases. Particularly, the author provides many
hints for a thorough investigation of the interaction between deductive databases and
The area news also includes the reports
on two important database events in 1997: Riccardo Torlone overviews about PODS'96
symposium, which is probably the most prestigious conference on database theory, and Franz
Baader, Manfred A. Jeusfeld, and Werner Nutt give a detailed description of the
workshop KRDB ("Knowledge Representation Meets Databases''), which took place in
conjunction with VLDB'97 in Athens, Greece, and whose main topic was accessing
Another contribution is the node
profile of the Technical University of Vienna by Nicola Leone. This profile, announced in
the past issue of the newsletter, appears with some delay but this inconvenient give us
the possibility to be informed on the recent advances obtained by the very active research
group in Vienna.
Finally, concerning the area activities
for 1998, we are organizing a second edition of the workshop LID -- 'Logic in Databases',
probably in September and in Cyprus. A main topic of the workshop should be data mining.
The first edition of LID was held on July 1996 in San Miniato (Pisa, Italy) and was
organized by the area in cooperation with the project ECUS033 "DEUS EX MACHINA:
deductive databases". We shall communicate more information on the event as soon as
organizative details will be settled.
Universita della Calabria
87030 Rende (CS), Italy