I'm using Composite C1 to build my project, using ASP.NET to write template. Referred to Starter sample project, there are several template already there, ex, "3 columns.master", "3 columns.xml" and some templates have no .xml files such as "Common.master", "NavigationColumn.master", also my own created template files have no .master files.
I'm puzzled, can someone explain to me What's the difference for template between .master and .xml? Thanks.