NXcanSAS HDF5 data file
  entry : NXentry
    @NX_class = "NXentry"
    @canSAS_class = "SASentry"
    @version  = "1.0"
    definition = "NXcanSAS"
    run = "<see the documentation>"
    title = "something descriptive yet short"
    data : NXdata
      @NX_class = "NXdata"
      @canSAS_class = "SASdata"
      @signal = "I"
      @I_axes = "<see the documentation>"
      @Q_indices : NX_INT = <see the documentation>
      I : NX_NUMBER
        @units = <see the documentation>
      Q : NX_NUMBER
        @units = NX_PER_LENGTH