Mark Lewis is a contributing author of the second edition of DITA 101: Fundamentals of DITA for Authors and Managers by the Rockley Group. He has authored several white papers on DITA metrics that prove the savings and high content reuse percentages possible with DITA's structured, topic-based architecture. Mark's DITA metrics model was a JoAnn Hackos—Rare Bird Award 2009 Competitor. Mark manages the DITA Metrics LinkedIn group and has presented on technical writing, DITA, and object-oriented design topics at DocTrain, STC, DITA North America, and other national conferences. Mark is a member of the Organization for the Advancement of Structured Information Standards (OASIS) DITA technical committee. He and John Hunt are cochairs of the OASIS DITA for the Web subcommittee. He has received Society for Technical Communication (STC) awards for Distinguished Chapter Service and the Florida Technical Communications Competition. Mark is the DITA Product Manager for Usability and a product evangelist for Quark.