Schema Translation - Information Systems Reengineering, Integration and Normalization - page 130

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Fig. 3.59 Map aggregation into a complex element sequence in XSD

of the associated elements depend on the cardinality between the related relations and
the relationship relation. Therefore, mapping relations into the XSD Graph is per-
formed according to the “minOccurs” and “maxOccurs” keywords with occurrences
specification (Fig. 3.63 ).

3.10 Summary

Schema translation is the first step of database reengineering. Directly mapping a
logical schema from one model to another may not be able to capture all the origi-
nal schema semantics. With user's help in a knowledge engineering approach, we