Sunday, November 25, 2018

Data and Meaning Part 1: The RDM Is Applied Theory

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“Fabian - With respect, maybe it's time to' shake the formal foundations' of data management, especially given the rising cost...
Saturday, November 10, 2018

Conceptual Modeling Is Not Data Modeling

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“Ok, now that we have those two (Parts 3 and 4 of your series) 'on the table' so to speak, perhaps you would address these question...
Saturday, November 3, 2018

Understanding Conceptual vs. Data Modeling Part 4: Properties-object Modeling

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Revised 6/26/19. In Part 1 and Part 2 we explained that when the RDM (1969-70) and the E/RM (1976) were introduced, there was no distin...
Sunday, October 28, 2018

Understanding Conceptual vs. Data Modeling Part 3: Don't Conflate Reality and Data

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In Part 1 and Part 2   we explained that between 1975-81, when the E/RM and RDM were introduced, there was no distinction between an inform...
Thursday, October 18, 2018

Understanding Conceptual vs. Data Modeling Parts 1-4

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As parts of a new multipart series, I have rewritten two previous posts that merit a new read. Understanding Conceptual vs. Data Modeli...
Saturday, September 29, 2018

Understanding Conceptual vs.Data Modeling Part 2: E/RM Models Reality, RDM Models Data

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Re-write 10/17/18 Revised 11/1/18 In Part 1 we explained that when the RDM and the E/RM were introduced, the distinct conceptual-logical-...
Tuesday, September 18, 2018

Don't Conflate/Confuse Primary Keys, PK Constraints, and Indexes

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“What is the difference between an index and a key? How are they related?” “There seams to be some confusion between what a Primary Key ...