"usage: exXCoherentFileSet {dirin=inputDirectoryName} ",
" dirout=outputDirectoryName ",
" { tag=group-elem | pos | ori } [sort] [write] ",
"usage: exXCoherentFileSet {dirin=inputDirectoryName} ",
" dirout=outputDirectoryName ",
" { tag=group-elem | pos | ori } [sort] [write] ",