Information Technology Reference
In-Depth Information
Fig. 3.61
Map participation
into a parent-child relation-
ship in XSD
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other relevant relations can also be extracted according to the one-to-many and
superclass-to-subclass navigability of the XML tree. Together these relations are
then mapped into the XML conceptual schema in DTD Graph, and then to DTD.
The DTD Graph and DTD are XML schemas but in diagram form for DTD Graph
as XML conceptual schema and in text form for DTD as XML logical schema.
Similarly, we can also map relational schema into an XSD and XSD Graph.
The XSD and XSD Graph not only have the same functions as the DTD and DTD
Graph, but also are richer in features and are more adaptable in the industry.
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