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Aimed at the Problems that were very difficult to realize exchange and integration for heterogeneous data, such as being different in content and format and quality of data and even some data format not being transformed or information lost after conversion and so on, because of the different data coming from different avenue provided by different user in implementing data share process of city emergency...
Aimed at the puzzle to realize exchange and integration for heterogeneous data, this paper proposed a sort of data exchange model of heterogeneous database based on middleware unified platform. Based on the mapping of model drive, the data exchange could be realized by a concrete model. Its thought was to express XML document being a tree composed by data object, in which each element type corresponded...
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