Non-Relational Databases Have Relationships Too
Isn’t it ironic that a technology that bears the label of “schema-less” is also known for the fact that schema…
Data Architecture Blogs
Data Architecture Blogs
Three Levels of Models Versus Business
Three Levels of Model Abstraction Traditional entity-relationship (E-R) modeling recognizes three different levels of abstraction at which models are developed:…
The Duck-Billed Platypus, or How Strict Data Hierarchies Can Choke You
You might remember back to your early school days, when you learned about the five major divisions of the vertebrates…
Data Architecture COMN Sense: Data Types and Roles
One of the most illuminating lessons I’ve learned about data modeling came from Len Silverston’s universal data models, where he…
Data Architecture COMN Sense – Is the Data Warehouse Dead?
It was a pleasure to attend a data warehousing event in Austin, Texas in early December to take a few…
Data Architecture COMN Sense: What are Data and Information?
Occasionally I encounter discussions on various social media sites arguing passionately about the definitions of the terms “data” and “information.”…
Data Architecture COMN Sense – The Missing Logical Layer in Data Management
Around 2009 someone used the term “NoSQL” to describe an emerging class of database management systems (DBMSs) that, as the…
Data Architecture COMN Sense: Relationships in Structured Data
In my blog last month, we looked at five aspects of relationship types, relationships in graphs, and how relationships are…
Data Architecture COMN Sense: Relationships and Semantics
Introduction Relationships are fundamental to contextual modeling, data modeling, and semantics. It’s important to understand them deeply. This blog will…
Combining Data from Multiple Sources – Join, Integrate, Blend?
Data blending is a newly emerged technique that is used primarily by those who work in the area of big…