Data exchange between heterogeneous schemas is a difficult problem that becomes more acute if the source and target schemas are from different data models. The data type of the objects to be exchanged can be useful information that should be exploited to help the data exchange process. So far little has been done to take advantage of this in inter model data exchange. Using a common data model has been shown to be effective in data exchange in general. This work aims to show how the common data model approach can be useful specifically in exchanging type information by use of a common type hierarchy.
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