# Deprecating MultiBlock datasets

**URL:** https://discourse.paraview.org/t/deprecating-multiblock-datasets/4950
**Category:** Development
**Tags:** proposal
**Created:** [July 24, 2020, 1:19pm UTC](https://discourse.paraview.org/t/deprecating-multiblock-datasets/4950 "2020-07-24T13:19:41Z")
**Posts on this page:** 1
**Showing post:** 50

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### Author: ![spyridon97](https://discourse.paraview.org/user_avatar/discourse.paraview.org/spyridon97/32/11569_2.png) [@spyridon97](https://discourse.paraview.org/u/spyridon97)
#### Post date: [April 3, 2026, 7:10pm UTC](https://discourse.paraview.org/t/deprecating-multiblock-datasets/4950/50 "2026-04-03T19:10:23Z")

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Steps to move forward

1. Make all filters that accept only vtkMultiBlockDataSet to accept vtkPartitionedDataSetCollection too
2. Make the pipeline optionally convert sources/readers/filters that generate vtkMultiBlockDataSet to generate vtkPartitionedDataSetCollection
3. Change the guts of every source/reader/filter to generate only vtkPartitionedDataSetCollection instead of vtkMultiBlockDataSet
4. Deprecate vtkMultiBlockDataSet

Steps 3/4 are breaking changes so hopefully they will make it in VTK 10.

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