[Paraview] Filter cell type from PolyData VTK file

[Viktor Sip]

Dear all,

is there a way to filter and show only a specific cell type?

In my application I am exporting a PolyData VTK file containing some 
Polys and Lines. When imported into Paraview, both Polys and Lines are 
shown, and I did not find a simple way to show only Polys.
What I can do is to export additional CellData array with a number 
specifying cell type and then apply Treshold in Paraview. However that 
seems redundant, as the type is already stored in the file somewhere.
So my question is, is there a direct way?

Simplified example of the exported VTK file is attached.

Kind regards,
Viktor
-------------- next part --------------
<VTKFile type="PolyData" version="0.1" byte_order="LittleEndian">
  <PolyData>
    <Piece NumberOfPoints="3" NumberOfPolys="1" NumberOfLines="3">
      <Points>
        <DataArray NumberOfComponents="3" type="Float32" format="ascii">1 0 0 0 1 0 1 1 0 </DataArray>
      </Points>
      <Polys>
        <DataArray type="Int32" Name="connectivity" format="ascii">0 1 2</DataArray>
        <DataArray type="Int32" Name="offsets" format="ascii">3</DataArray>
      </Polys>
      <Lines>
        <DataArray type="Int32" Name="connectivity" format="ascii">0 1 1 2 0 2</DataArray>
        <DataArray type="Int32" Name="offsets" format="ascii">2 4 6</DataArray>
      </Lines>
    </Piece>
  </PolyData>
</VTKFile>