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Fig. 9.13 XML schema before normalization
We normalize the data redundancy of the many-to-many cardinality between el-
ement Server-Computer and element Portable-Computer by replacing them with
Server-Computer-Ptr and element Portable-Computer-Ptr. The two pointers re-
fer to element Server-Computer and element Portable-Computer as shown below
(Fig. 9.14 ):
Fig. 9.14 The XML Schema after normalization
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