  distribution
   layout_version 1.0
   product
    tag b
    fileset
     tag d
     file
      path /tmp/e
    fileset
     tag d1
     file
      path /tmp/e1
   product
    tag bP1
    fileset
     tag dP1
     file
      path /tmp/eP1
    fileset
     tag d1P1
     file
      path /tmp/e1P1
