THIS POST IS OUTDATED AND ONLY KEPT FOR HISTORIC PURPOSES Please consult the up to date roadmap here: VTKHDF: Implementation Status - VTK documentation ========================================================================= =======================================================================…

Really great work. HDF5 is very useful and portable when working with large datasets. I noticed that structured and rectilinear grids as implemented in legacy VTK are missing from the roadmap? Are they difficult to implement or not a priority?

I don’t see any potential difficulty to support it as you said it’s because, for now, adding other VTK types have low priorities. However, as the VTKHDF File Format aims to support all VTK data objects like what the XML format does, we should support it in the future (like for vtkHyperTreeGrid, vt…

I want to add that any dataset type not mentionned here is simply not supported by the specifications nor the implementation. Any of them could be added and implemented though! Feel free to reach out to Kitware!

Should the roadmap be updated post Paraview 5.13 release?

The roadmap is kept up to date with the status of VTK master and not related to the ParaView release, although some feature are present, or not, in ParaView 5.13.0. Can you precise your suggestion ?

Added rectilinear grid support discussion link.

Maybe this is a little late, but can we please choose a file extension for VTKHDF files that is not .hdf? It’s extremely frustrating when the extension for a general container format like hdf5 (or netCDF or bp or xml or json) is used over and over for conventions that are incompatible with each othe…

yes, this is what we recommend https://docs.vtk.org/en/latest/design_documents/VTKFileFormats.html#extension :slightly_smiling_face:

Perfect. I guess I just looked at the wrong file in the example scripts repository pointed to by beginning of this post: https://gitlab.kitware.com/keu-public/vtkhdf/vtkhdf-scripts/-/blob/main/vtkxml-to-vtkhdf/test.sh . It might be worth updating that.

Is there any prospect of integrating vtkDGCell support into VTKHDF? It would be very useful for our finite-element simulations on Unstructured Grid. [image] New `vtkCellGrid` Functionality Development Hi all, vtkCellGrid and its related source/filter classes …

VTKHDF roadmap

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Chris_Richardson (Chris Richardson) July 18, 2025, 12:31pm 18

Is there any prospect of integrating vtkDGCell support into VTKHDF?
It would be very useful for our finite-element simulations on Unstructured Grid.