VTI specification

Thanks, but I’ve read that several times and don’t see anything about Direction and whether it’s old and removed or new and should be included in all future files.

Here’s all I can see about VTI:

<VTKFile type="ImageData" ...>
  <ImageData WholeExtent="x1 x2 y1 y2 z1 z2"
   Origin="x0 y0 z0" Spacing="dx dy dz">
   <Piece Extent="x1 x2 y1 y2 z1 z2">
      <PointData>...</PointData>
      <CellData>...</CellData>
   </Piece>
   </ImageData>
</VTKFile>

WholeExtent, Origin and Spacing are included and relatively well defined. Does the omission of Direction mean it’s no longer supported/required?