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GENERIC FRAMEWORK AND KEY ISSUES FOR UPDATES PROPAGATION BETWEEN HETEROGENEOUS SPATIAL DATABASES

GENERIC FRAMEWORK AND KEY ISSUES FOR UPDATES PROPAGATION BETWEEN HETEROGENEOUS SPATIAL DATABASES,WANG Yuhong,CHEN Jun

GENERIC FRAMEWORK AND KEY ISSUES FOR UPDATES PROPAGATION BETWEEN HETEROGENEOUS SPATIAL DATABASES  
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Data updating is a significant stage in the life of a geographical information system (GIS). When geodata producers have finished updating their own database (named Master Database, MDB), the problem of how to propagate the updates in new version of MDB to users' database (named Client Database, CDB) has become a research focus. Although many works have been done to resolve this problem, it may be underlined that the common weak point of these different works is their lack of genericity. In this paper, we firstly analyze heterogeneities between MDB and CDB. Afterward, the Generic framework for updates propagation is presented. Several key issues within the proposed framework are discussed in detail, mainly including schema matching, updateing information retrieval, semantic transformation, update Integration, consistency maintenance, and so on. Finally, an implemented tool based on analysis of the above issues is presented.
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