TY - GEN
T1 - Registering scientific information sources for semantic mediation
AU - Gupta, Amarnath
AU - Ludäscher, Bertram
AU - Martone, Maryann E.
N1 - Funding Information:
Work partially supported by NIH BIRN-CC 3 P41 RR08605-08S1, NSF/NPACI Neuroscience Thrust ASC-975249, and DOE SciDAC/SDM DE-FC02-01ER25486.
Publisher Copyright:
© Springer-Verlag Berlin Heidelberg 2002.
PY - 2002
Y1 - 2002
N2 - In a conventional information mediation scenario it is assumed that all sources, including their schemas, are known before the integrated view is defined. We have found this assumption to be unrealistic for scientific information integration–new relevant sources are discovered quite frequently, and need to be integrated incrementally with an existing federation. In this paper, we address the issue of source registration, the mechanism by which a new information source “registers” its semantics with the mediator, such that not only new views can be defined with the newly joining source, but existing views can benefit from the source without any redefinition. We approach the problem in the framework of semantic (a.k.a. knowledge-based or model-based) mediation, a version of information integration where the sources cannot be integrated solely based on their own logical schema, but need additional domain knowledge at the mediator to “glue” them together. We solve the problem by introducing a process called contextualization, whereby a source specifies a set of axioms to express its own conceptual model relative to the mediator’s knowledge base. To this end, we present a context specification language CSL that allows the user to specify this mapping, and illustrate how the mediator interprets a CSL specification to update its knowledge schema and preexisting views. The examples are derived from a real-world scenario involving an ongoing collaboration with several neuroscience groups.
AB - In a conventional information mediation scenario it is assumed that all sources, including their schemas, are known before the integrated view is defined. We have found this assumption to be unrealistic for scientific information integration–new relevant sources are discovered quite frequently, and need to be integrated incrementally with an existing federation. In this paper, we address the issue of source registration, the mechanism by which a new information source “registers” its semantics with the mediator, such that not only new views can be defined with the newly joining source, but existing views can benefit from the source without any redefinition. We approach the problem in the framework of semantic (a.k.a. knowledge-based or model-based) mediation, a version of information integration where the sources cannot be integrated solely based on their own logical schema, but need additional domain knowledge at the mediator to “glue” them together. We solve the problem by introducing a process called contextualization, whereby a source specifies a set of axioms to express its own conceptual model relative to the mediator’s knowledge base. To this end, we present a context specification language CSL that allows the user to specify this mapping, and illustrate how the mediator interprets a CSL specification to update its knowledge schema and preexisting views. The examples are derived from a real-world scenario involving an ongoing collaboration with several neuroscience groups.
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U2 - 10.1007/3-540-45816-6_23
DO - 10.1007/3-540-45816-6_23
M3 - Conference contribution
AN - SCOPUS:84974710816
SN - 9783540458166
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 182
EP - 198
BT - Conceptual Modeling – ER 2002 - 21st International Conference on Conceptual Modeling, Proceedings
A2 - Spaccapietra, Stefano
A2 - March, Salvatore T.
A2 - Kambayashi, Yahiko
PB - Springer
T2 - 21st International Conference on Conceptual Modeling, ER 2002
Y2 - 7 October 2002 through 11 October 2002
ER -