Using wrapper agents to answer queries in distributed informationsystems
Serafini, L.; Ghidini, C.
MultiAgent Systems, 2000. Proceedings. Fourth International Conference on
Volume , Issue , 2000 Page(s):429 - 430
Digital Object Identifier 10.1109/ICMAS.2000.858509
Summary:Nowadays, one of the objectives of information integration is to
provide a global view of the information contained in a set of
information sources. This is an important objective as global views
enable us to design applications that use information contained in a set
of autonomous and heterogeneous information sources. The global view is
represented using a global schema, which is usually different from the
schemata of the information sources. Users interested in exploiting the
global information must be aware of the global schema. One of the
drawbacks of this approach is that users working with local
applications, who are often interested in exploiting global information,
cannot access global information using their own local applications, as
the latter are based on local scemata and are hardly adaptable to the
global schema. What we envisage is the possibility for local
applications of exploiting information contained in other information
sources through their local schema. As an important effect, users can
utilize global information via their usual local applications. The
architecture we adopt is based on a multi-agent structure. In this
structure there is no central agent, which plays the role of a mediator
to integrate all the information sources. The key role in the process of
information integration is played by the wrapper agents. Wrapper agents
(or simply wrappers) are provided both for each information source and,
if any, for each global view
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