[Paraview] First trial file does not work-help!

[Emrah Ersan Erdogan]

Hi,

I am a new user of paraview and try to understand .vtu file format. 
Just as a simple test I wanted to create two pieces one solely defines 4 points and a cell with no attributes, hence forming geometry only. And the second piece defines only points with point attributes.

However, it seems I am doing something(s) wrong since paraview reader does not recognize the information. It would be great if somebody tells me what I am doing wrong. Afterwards I can take it off by myself I guess.

Thanks a bunch!

Ersan


<?xml version="1.0"?>
<VTKFile type="UnstructuredGrid" version="0.1" byte_order="LittleEndian”>
   <UnstructuredGrid>
      <Piece NumberOfPoints=“4” NumberOfCells=“1”>
         <Points>
            <DataArray type=“Float64” NumberOfComponents=“3” format=“ascii”>
               0.00 0.00 0.00 1.00 0.00 0.00 1.00 1.00 0.00 0.00 1.00 0.00
            </DataArray>
         </Points>
         <Cells>
            <DataArray type=“Int64” Name=“connectivity” format=“ascii”>
               0 1 2 3
            </DataArray>
            <DataArray type=“Int64” Name=“offsets” format=“ascii”>
               4
            </DataArray>
            <DataArray type=“UInt8” Name=“types” format=“ascii”>
               9
            </DataArray>
         </Cells>
         <PointData>
         </PointData>
         <CellData>
         </CellData>
      </Piece>
      <Piece NumberOfPoints=“4” NumberOfCells=“0”>
         <Points>
            <DataArray type=“Float64” NumberOfComponents=“3” format=“ascii”>
               0.25 0.25 0.00 0.75 0.25 0.00 0.75 0.75 0.00 0.25 0.75 0.00
            </DataArray>
         </Points>
         <Cells>
         </Cells>
         <PointData Scalars="strain">
            <DataArray type=“Float64” Name=“strain” NumberOfComponents=“1” format=“ascii”>
               2.0 2.0 3.0 1.0
            </DataArray>
         </PointData>
         <CellData>
         </CellData>
      </Piece>
   </UnstructuredGrid>
</VTKFile>