Certain details of SQL Server 2005 query plans can be viewed only in XML versions of the plans, which you can obtain by using the XML Showplan feature. I showed you examples of XML Showplan output in "Use Missing-Index Groups for Query Tuning," April 2007, InstantDoc ID 95220. Let's continue that discussion by examining additional examples of query-plan details that can be found only in a plan's XML output and a tool that can make working with XML query plans a pleasure. On an unrelated note, this issue marks the 100th issue of SQL Server Magazine. I reminisce about my longtime involvement as a contributor on page 40.