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Michael Kay on data constraints

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Bill de hÓra

Posts: 1137
Nickname: dehora
Registered: May, 2003

Bill de hÓra is a technical architect with Propylon

Michael Kay on data constraints

Posted: Aug 13, 2004 4:54 AM

This post originated from an RSS feed registered with Java Buzz by Bill de hÓra.
Original Post: Michael Kay on data constraints Feed Title: Bill de hÓra Feed URL: http://www.dehora.net/journal/atom.xml Feed Description: FD85 1117 1888 1681 7689 B5DF E696 885C 20D8 21F8	Latest Java Buzz Posts Latest Java Buzz Posts by Bill de hÓra Latest Posts From Bill de hÓra

Seen on xml-dev: "I tend to be a little wary of constraints myself. Many of those you see in student textbooks are misguided. If I see a schema (XML or RDB) with the constraint that employees must be over 16, I ask myself what the IT department would do if the business decided to hire someone under 16. If there's a rule that an employee's manager must themselves be an employee, I ask what would happen when someone is told that they now report to a contractor. It's not the job of computers to limit what people are allowed to do (or the job of the IT department to regulate the business). A guideline I use is that constraints should be there only to protect the IT system itself from data that it cannot handle."...

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