Enjoy fast, free delivery, exclusive deals, and award-winning movies & TV shows with Prime
Try Prime
and start saving today with fast, free delivery
Amazon Prime includes:
Fast, FREE Delivery is available to Prime members. To join, select "Try Amazon Prime and start saving today with Fast, FREE Delivery" below the Add to Cart button.
Amazon Prime members enjoy:- Cardmembers earn 5% Back at Amazon.com with a Prime Credit Card.
- Unlimited Free Two-Day Delivery
- Streaming of thousands of movies and TV shows with limited ads on Prime Video.
- A Kindle book to borrow for free each month - with no due dates
- Listen to over 2 million songs and hundreds of playlists
- Unlimited photo storage with anywhere access
Important: Your credit card will NOT be charged when you start your free trial or if you cancel during the trial period. If you're happy with Amazon Prime, do nothing. At the end of the free trial, your membership will automatically upgrade to a monthly membership.
Buy new:
-31% $33.99$33.99
Ships from: Amazon.com Sold by: Amazon.com
Save with Used - Very Good
$24.27$24.27
$3.99 delivery Monday, July 29
Ships from: Friends of the San Francisco Public Library Sold by: Friends of the San Francisco Public Library
Download the free Kindle app and start reading Kindle books instantly on your smartphone, tablet, or computer - no Kindle device required.
Read instantly on your browser with Kindle for Web.
Using your mobile phone camera - scan the code below and download the Kindle app.
Data and Reality: A Timeless Perspective on Perceiving and Managing Information in Our Imprecise World, 3rd Edition Third Edition
Purchase options and add-ons
Data and Reality gracefully weaves the disciplines of psychology and philosophy with data management to create timeless takeaways on how we perceive and manage information. Although databases and related technology have come a long way since 1978, the process of eliciting business requirements and how we think about information remains constant. This book will provide valuable insights whether you are a 1970s data-processing expert or a modern-day business analyst, data modeler, database administrator, or data architect.
This third edition of Data and Reality differs substantially from the first and second editions. Data modeling thought leader Steve Hoberman has updated many of the original examples and references and added his commentary throughout the book, including key points at the end of each chapter.
The important takeaways in this book are rich with insight yet presented in a conversational writing style. Here are just a few of the issues this book tackles:
- Has "business intelligence" replaced "artificial intelligence"?
- Why is a map's geographic landscape analogous to a data model's information landscape?
- Where do forward and reverse engineering fit in our thought process?
- Why are we all becoming "data archeologists"?
- What causes the communication chasm between the business professional and the information technology professional, and how can the logical data model bridge this gap?
- Why do we invest in hardware and software to solve business problems before determining what the business problems are in the first place?
- What is the difference between oneness, sameness, and categories?
- Why does context play a role in every design decision?
- Why do the more important attributes become entities or relationships?
- Why do symbols speak louder than words?
- What's the difference between a data modeler, a philosopher, and an artist?
- Why is the 1975 dream of mapping all attributes still a dream today?
- What influence does language have on our perception of reality?
- Can we distinguish between naming and describing?
From Graeme Simsion's foreword:
While such fundamental issues remain unrecognized and unanswered, Data and Reality, with its lucid and compelling elucidation of the questions, needs to remain in print. I read the book as a database administrator in 1980, as a researcher in 2002, and just recently as the manuscript for the present edition. On each occasion I found something more, and on each occasion I considered it the most important book I had read on data modeling. It has been on my recommended reading list forever. The first chapter in particular should be mandatory reading for anyone involved in data modeling.
In publishing this new edition, Steve Hoberman has not only ensured that one of the key books in the data modeling canon remains in print, but has added his own comments and up-to-date examples, which are likely to be helpful to those who have come to data modeling more recently. Don't do any more data modeling work until you've read it.
- ISBN-101935504215
- ISBN-13978-1935504214
- EditionThird
- PublisherTechnics Publications, LLC
- Publication dateMarch 19, 2012
- LanguageEnglish
- Dimensions8 x 0.37 x 10 inches
- Print length162 pages
Frequently bought together

Similar items that may deliver to you quickly
Editorial Reviews
Review
From Graeme Simsion's foreword:
While such fundamental issues remain unrecognized and unanswered, Data and Reality, with its lucid and compelling elucidation of the questions, needs to remain in print. I read the book as a database administrator in 1980, as a researcher in 2002, and just recently as the manuscript for the present edition. On each occasion I found something more, and on each occasion I considered it the most important book I had read on data modeling. It has been on my recommended reading list forever. The first chapter in particular should be mandatory reading for anyone involved in data modeling.
In publishing this new edition, Steve Hoberman has not only ensured that one of the key books in the data modeling canon remains in print, but has added his own comments and up-to-date examples, which are likely to be helpful to those who have come to data modeling more recently. Don't do any more data modeling work until you've read it.
About the Author
Product details
- Publisher : Technics Publications, LLC; Third edition (March 19, 2012)
- Language : English
- Paperback : 162 pages
- ISBN-10 : 1935504215
- ISBN-13 : 978-1935504214
- Item Weight : 14.5 ounces
- Dimensions : 8 x 0.37 x 10 inches
- Best Sellers Rank: #1,018,721 in Books (See Top 100 in Books)
- #104 in Network Storage & Retrieval Administration
- #140 in Information Theory
- #142 in Computer Simulation (Books)
- Customer Reviews:
About the author

William Kent (1936-2005) was a renowned researcher in the field of data modeling. Author of Data and Reality, he wrote scores of papers and spoke at conferences worldwide, posing questions about database design and the management of information that remain unanswered today.
Though he earned a bachelor’s degree in chemical engineering and a master’s in mathematics, he had no formal training in computer science. Kent worked at IBM and later at Hewlett-Packard Laboratories, where he helped develop prototype database systems. He also served on or chaired several international standards committees.
Kent lived in New York City and later Menlo Park, Calif., before retiring to Moab, Utah, to pursue his passions of outdoor photography and protecting the environment.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on Amazon-
Top reviews
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
If you are in data modeling and database area, believe me, this is a must read. It is about the philosophy of data modeling and how data and reality are related. In my opinion, its content cannot be obsolete. It is technology independent. The concept of naming and identification alone is priceless for data modelers. I can't believe I have been working in the database area for more than 30 years without it.
It's been a while since I read it, very interesting discourse on modelling data.
Worse yet, as others have described, the audiobook is littered with what I think are footnotes, that are read aloud in a way that diverges the listener’s attention away from the topic at hand.
I strongly recommend that this audiobook be discontinued. The paperback experience of this book might be very different, but the audiobook was a slog that I regret putting myself through.
His exposure and description of relationships and how to address them was enlightening.
Top reviews from other countries
好きな人は好きなんだろうが、求めていたものと異なる。
In the last 25 years, solutions have been developed to many of the data problems described by Kent. Sadly, it seems that very few developers or analysts really understand the issues raised by Kent which is probably why so many software projects end up as expensive failures.
Chapters 1-9 expose the data management problems and the awful limitations of what in 1977 passed as "data models" (e.g. the necessity to force fit "many to many" concepts into the inflexible "1 to many" structure of the traditional heirarchical databases and the aparrent lack of any widespread understanding of conceptual models and abstract domains. (Still true today)
Chapter 10 gives interesting insights into the relational model which at the time (1977) was only 8 years old and was not widely available in database products.
Chapter 11 is entitled "Elementary Concepts: Another Model?"
In this excellent chapter, Kent explains n-ary relationships and shows how binary relationships are best seen as instances of the set of n-ary relationships.
Chapter 12 contains insights into the hidden effects of language on thinking.
Many of the ideas in Chapter 11 later appeared in NIAM (Nijssen's Information Analysis Methodology). In the mid 1980's Terry Halpin worked with Sjir Nijssen and formalised NIAM as ORM (Object-Role Modeling language). Terry's most recent books on this matter are:
1: "Information Modeling and Relational Databases" -MKP 2001.
This 754 page book is the ORM Bible and is a set book for University Students in the USA.
2: "Database Modeling with Microsoft Visio for Enterprise Architects" MKP 2003.
This book shows you how to use the ORM tool which provides solutions to most of the problems that Kent describes in his book. This book is also a set book for University students in the USA. (I'm pleased to have co-authored this book with Terry)
Historical Note:
An ORM tool was developed in 1989 and first appeared as a product called "InfoDesigner". This tool evolved through the 1990's as "InfoModeler" which was bought by Visio who incorporated it into the high end Visio product. Microsoft then bought Visio and the fruits of Terry's many years of hard work and dedication are now (fairly deeply) embedded in Microsoft Visual Studio.NET for Enterprise Architects. (You can download the latest beta from the Microsoft Website).
In conclusion:
"Data and Reality" gives an excellent description of the horrendous data definition problems that are still with us today.
If you read "Data and Reality" and then say "Wow! Yes! William Kent has articulated problems to which we urgently need a solution!, then I strongly recommend that you investigate ORM.








