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Knowledge Maps – Structure Versus Meaning

By   /  October 18, 2017  /  Data Blogs | Information From Enterprise Leaders, Data Education, Data Modeling Blogs, Data Modeling News, Articles, & Education, Database Blogs, Database News, Articles, & Education  /  4 Comments

Click to learn more about author John Singer. We are at an inflection point in the process of designing and building computerized systems.  Let’s be honest – even with the explosion of new data technologies we are still building the same unit record processing systems from the 60’s, although with a bit more sophistication than an […]

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Beware of Symmetric Relationships

By   /  September 28, 2016  /  Data Blogs | Information From Enterprise Leaders, Data Education, Data Modeling Blogs, Data Modeling News, Articles, & Education, Enterprise Information Management, Information Management Blogs  /  No Comments

Click to learn more about author Michael Blaha. A symmetric relationship is a self-relationship with the same multiplicity and role name on each end. Symmetric relationships are acceptable for conceptual models. But they are problematic for logical and physical models – you should rework the model to eliminate them. An Example For an example, consider […]

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