XML format for a file that only contains points?

Thanks! Using the @jfavre and @olesenm’s advice I was able to get this to work. I have included the XML text below in case anyone else needs to do this. I needed to add ‘Type=’ to the ‘Vert’ data arrays and include a ‘PointData’ section to get the values associated with the point coordinates:

<?xml version="1.0"?>
<VTKFile type="PolyData" version="0.1" byte_order="LittleEndian" header_type="UInt64">
  <PolyData>
    <Piece NumberOfPoints="8" NumberOfVerts="8">
      <Points>
        <DataArray type="Float64" Name="Coordinate_of_points" NumberOfComponents="3" format="ascii">
            0 0 0
			1 0 0
			1 1 0
			0 1 0
			0 0 1
			1 0 1
			1 1 1
			0 1 1
        </DataArray>
      </Points>
	  <PointData>
		<DataArray type="Float64" Name="Value_at_point" NumberOfComponents="1" format="ascii">
            0.6
			1.1
			1.9
			0.1
			0.9
			1.2
			1.3
			0.3
        </DataArray>
	  </PointData>
      <Verts>
        <DataArray type="Int32" Name="offsets">
			1 2 3 4 5 6 7 8
        </DataArray>
        <DataArray type="Int32" Name="connectivity">
			0 1 2 3 4 5 6 7
        </DataArray>
      </Verts>
    </Piece>
  </PolyData>
</VTKFile>

I’ve marked this one as the solution since it has the working XML text, but credit to @jfavre and @olesenm!