Title :
An Alogrithm for Indirect Schema Mapping Composition
Author :
Wang, Bo ; Guo, Bo
Author_Institution :
Coll. of Inf. Syst. & Manage., Nat. Univ. of Defense Technol., Changsha
Abstract :
There are a large number of indirect schema mappings between peers in the network. To improve the efficiency of data exchange and queries, indirect mappings are needed to be composed. Defined the combination operations of schema elements in indirect mappings, and gave the expression of indirect mappings. Proposed a strategy, named schema element back, to solve the problem of indirect mapping composition, and gave the indirect mapping composition generation algorithm based on such strategy. Experiments showed that indirect mapping composition can improve the efficiency of data exchange, and compared with other non-full mapping composition generation algorithms, and indirect mapping composition generated by our algorithm based on schema element back strategy can completely eliminate the infection of media schema with no reduction of the composition efficiency.
Keywords :
database theory; query processing; data exchange; data querying; indirect media schema mapping composition generation algorithm; schema element back strategy; Algebra; Computer network management; Computer science; Computer science education; Databases; Educational institutions; Educational technology; Information management; Management information systems; Technology management; indirect mapping; mapping composition; schema mapping;
Conference_Titel :
Education Technology and Computer Science, 2009. ETCS '09. First International Workshop on
Conference_Location :
Wuhan, Hubei
Print_ISBN :
978-1-4244-3581-4
DOI :
10.1109/ETCS.2009.696