SEE 2007 Conference Proceedings - Institut für Informatik ...

SEE 2007 CONFERENCE PROCEEDINGS
Heterogeneities
Example 2: Hierarchy vs. Collapsed Hierarchy
LHS
RHS
Employee
name : String
Employee
name: String
kind: {SE, NSE}
Scientific
Employee
Non-Scientific
Employee
© 2007 IFS University of Linz, BIG Vienna University of Technology
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Heterogeneities
Example 3: Inverse Relationships
LHS
RHS
parent
Person
2 children *
Person
© 2007 IFS University of Linz, BIG Vienna University of Technology
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37 Technical Report IfI-07-07