Relationships

Relationships The [Missing] Link Michael P. Meier WhiteLake Data Management

What I’m Going to Tell You ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Modeling Formalisms ,[object Object],[object Object],[object Object],[object Object]

It wasn’t always so ,[object Object],[object Object],[object Object],*1976 article published in ACM’s Transactions on Database Systems

Chen Diagram doctor doctor consultation Dr-pt residency

Chen Diagram Suggests ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

“Modern” Interpretation Doctor Doctor or Doctor We usually don’t even get names on the “relationships.”

Which Suggests ,[object Object],[object Object],[object Object],[object Object]

More Importantly ,[object Object],[object Object],[object Object],[object Object],[object Object]

Even Worse Doctor This is what we usually see. This is the barest hint about the possible existence of relationships

Effect on Data Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Undefined Relationships ,[object Object],[object Object],[object Object],[object Object],[object Object]

Suggestions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

There is nothing simple about a relationship. ,[object Object],[object Object],[object Object]

Relationships

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Relationships