Bill Inmon

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William H. Inmon (born 1945) is an American computer scientist, recognized by many as the father of the data warehouse.[1][2] Inmon wrote the first book, held the first conference (with Arnie Barnett), wrote the first column in a magazine and was the first to offer classes in data warehousing. Inmon created the accepted definition of what a data warehouse is - a subject oriented, nonvolatile, integrated, time variant collection of data in support of management's decisions. Compared with the approach of the other pioneering architect of data warehousing, Ralph Kimball, Inmon's approach is often characterized as a top-down approach.


William H. Inmon was born July 20, 1945 in San Diego, California. He received his Bachelor of Science degree in mathematics from Yale University, and his Master of Science degree in computer science from New Mexico State University.

He worked for American Management Systems and Coopers & Lybrand before 1991, when he founded the company Prism Solutions, which he took public. In 1995 he founded Pine Cone Systems, which was renamed Ambeo later on. In 1999, he created a corporate information factory web site for his consulting business.[3]

Inmon coined terms such as the government information factory, as well as data warehousing 2.0. Inmon promotes building, usage, and maintenance of data warehouses and related topics. His books include "Building the Data Warehouse" (1992, with later editions) and "DW 2.0: The Architecture for the Next Generation of Data Warehousing" (2008).

In July 2007, Inmon was named by Computerworld as one of the ten people that most influenced the first 40 years of the computer industry.[4]

Inmon's association with data warehousing stems from the fact that he wrote the first[5] book on data warehousing he held the first conference on data warehousing (with Arnie Barnett), he wrote the first column in a magazine on data warehousing, he has written over 1,000 articles on data warehousing in journals and newsletters, he created the first fold out wall chart for data warehousing and he conducted the first classes on data warehousing.

In 2012, Inmon developed and made public technology known as "textual disambiguation". Textual disambiguation applies context to raw text and reformats the raw text and context into a standard data base format. Once raw text is passed through textual disambiguation, it can easily and efficiently be accessed and analyzed by standard business intelligence technology. Textual disambiguation is accomplished through the execution of textual ETL.


Inmon has published more than 55 books and 2,000 articles on data warehousing and data management. A selection:

  • 1981. Effective Data Base Design. Prentice Hall, 1981
  • 1986. Information systems architecture : a system developer's primer. Prentice-Hall.
  • 1986. The dynamics of data base. With Thomas J. Bird, Jr. Prentice-Hall.
  • 1988. Information engineering for the practitioner : putting theory into practice. Prentice Hall.
  • 1992. Rdb/VMS: Developing the Data Warehouse. With Chuck Kelley, QED, 1992
  • 1992. Building the Data Warehouse. 1st Edition. Wiley and Sons
  • 1998. Corporate Information Factory. With Claudia Imhoff and Ryan Sousa. John Wiley and Sons
  • 2000. Exploration Warehousing: Turning Business Information into Business Opportunity. With R. H. Terdeman, John Wiley and Sons
  • 2007. Business Metadata. With Bonnie Oneil and Lowell Fryman. Elsevier Press 2007
  • 2007. Tapping Into Unstructured Data. With Tony Nesavich. Prentice Hall, 2007
  • 2008. DW 2.0 - Architecture for the Next Generation of Data Warehousing. With Derek Strauss and Genia Neushloss, Elsevier Press, 2008
  • 2014. Data Architecture: A Primer for the Data Scientist. With Dan Linstedt, Elsevier Kaufman, 2014
  • 2015. Preventing Litigation: An early warning system to get big value out of big data. Business Expert Press, 2015
  • 2016, Data Lake Architecture - Keeping Your Data Lake from Turning into a Garbage Dump, Technics Publications, NJ, 2016
  • 2017, Turning Text into Gold - Taxonomies and Textual Analytics, Technics Publications, NJ 2017
  • 2017, Turning Spreadsheets into Corporate Data, Technics Publications, NJ 2017
  • 2018, Hearing the Voice of the Customer, Technics Publications, NJ 2018
  • 2019, Data Architecture: Second Edition, Elsevier Publications, 2019


  1. ^ Jill Dyché (2000). e-Data: turning data into information with data warehousing. Addison-Wesley. p.323.
  2. ^ Alexander Factor (2001). Analyzing Application Service Providers. Prentice Hall PTR. p.290.
  3. ^ About Bill : William H. Inmon, "The Father of Data Warehousing". Inmon Consulting Services 2007.
  4. ^ Computer World Magazine's July 2007 issue.
  5. ^ Inmon, William H. (1992). Building the data warehouse. Boston: QED Technical Pub. Group. ISBN 0-89435-404-3. OCLC 24846118.

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