Saturday, February 16, 2019
Class, Type, Set, Relvar, and Relation
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Note: This is a rewrite of a part of an older post (now redirecting here), to bring into line with McGoveran's formalization, re-inter...
Sunday, February 10, 2019
Understanding Domains and Attributes
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Note: This is a rewrite of one section of an older post (page thereof now links here), to bring it into line with McGoveran's formaliz...
Saturday, January 19, 2019
Data and Meaning Part 4: Query and Result Correctness
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As we have seen in Parts 1 , 2 , and 3 , the RDM is a formal theory adapted and applied to database management: database relations (1) prese...
Wednesday, January 9, 2019
Data and Meaning Part 3: Database Design
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We have seen in Part 2 that the meaning of data in a database is the conceptual model that the database is intended to represent, namely...
Tuesday, January 1, 2019
Data and Meaning Part 2: Types of Business Rules
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Per Part 1 , meaning is captured during conceptual modeling as information about objects of interest, specifically their properties (some...
Sunday, December 23, 2018
Happy holidays and a new year!
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Sunday, December 2, 2018
What Is a Data Model, and What It Is Not
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“The term data model is used in two distinct but closely related senses. Sometimes it refers to an abstract formalization of the objects a...
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