Lonnie Wall Lonnie Wall (Ellicott City, MD) is a Principal Architect for RDA, with more than 16 years experience in software development. His primary area of expertise is designing and implementing large distributed applications using XML on various platform. In addition, Lonnie has extensive experience with the use of Web Service interfaces using XML contracts. Recently, Lonnie designed a large Web-based application for NASD, hosted on Windows 2000, which uses XML in the middle tier and XSL to generate Web content. Read More Read Less