Bob DuCharme

Bob has been involved in semantic web work since 2002. He is a technical writer at Commonwealth Computer Research, Inc., a research and analytics firm specializing in machine learning and geospatial analytics. Previously, Bob did RDF and SPARQL solution architecture at TopQuadrant and data and systems architecture at Moody's Investors Service and LexisNexis.

He is the author of Manning Publications' XSLT Quickly, Prentice Hall's XML: The Annotated Specification and SGML CD, and McGraw Hill's Operating Systems Handbook. Bob has written for Nodalities Magazine, O'Reilly Network's, Dr. Dobb's Journal, and IBM developerWorks. He received his BA in Religion from Columbia University and his Masters in Computer Science from New York University. In the newsletter, editor Kendall Clark once wrote "Does anyone write tech prose as clear as Bob?"

Contact him at, especially if you have problems with examples in the book. For more general SPARQL questions, you'll probably get a quicker answer at the questions section of because of the number of people around the world who know SPARQL well and check it often.