external_master.hdf5 : NeXus data file
  @default = entry
  entry:NXentry
    @NX_class = NXentry
    @default = data
    data:NXdata
      @NX_class = NXdata
      @signal = counts
      @axes = two_theta
      @two_theta_indices = [0]
      counts:NX_INT32[31] = [1037, 1318, 1704, '...', 1321]
        @units = counts
        @file = external_counts.hdf5
        @path = /entry/instrument/detector/counts
      two_theta:NX_FLOAT64[31] = [17.926079999999999, 17.925909999999998, 17.925750000000001, '...', 17.92108]
        @units = degrees
        @file = external_angles.hdf5
        @path = /angles
    instrument:NXinstrument
      @NX_class = NXinstrument
      detector:NXdetector
        @NX_class = NXdetector
        counts:NX_INT32[31] = [1037, 1318, 1704, '...', 1321]
          @units = counts
        two_theta:NX_FLOAT64[31] = [17.926079999999999, 17.925909999999998, 17.925750000000001, '...', 17.92108]
          @units = degrees
          @file = external_angles.hdf5
          @path = /angles