This XSD document describes the muSR file structure for CERN/ROOT based files. In the following it will be called MusrRoot. It is currently the default standard for writting muSR data files at the Paul Scherrer Institute. Author: Andreas Suter, andreas.suter@psi.ch $Id: MusrRoot.xsd 5092 2012-03-13 07:47:00Z nemu $ The histos folder is containing potentially various subfolders. At least two subfolders, called DecayAnaModule, and SlowControlAnaModule, which holds the muSR decay histograms, must be present.