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+# Clarified license of test data
+
+The VTK-m source comes distributed with several data files used for
+regression testing. Some of these are generated specifically by VTK-m
+developers and are released as part of the VTK-m license, but some come
+from external sources. For those that come from external sources, we have
+clarified the license and attribution of those files. In particular, the
+following files originate from external sources.
+
+* **internet.egr**: Distributed as part of a graph data set paper. The
+  license of this data is compatible with VTK-m's license. The file is
+  placed in the third-party data directory and the information has been
+  updated to clearly document the correct license for this data.
+* **example.vtk** and **example_temp.bov**: Distributed as part of the
+  VisIt tutorials. This data is provided under the VisIt license (per Eric
+  Brugger), which is compatible with VTK-m's license. The files are moved
+  to the third-party data directory and the license and attribution is
+  clarified. (These files were previously named "noise" but were changed to
+  match the VisIt tutorial files they came from.)
+* **vanc.vtk** Data derived from a digital elevation map of Vancouver that
+  comes from GTOPO30. This data is in the public domain, so it is valid for
+  us to use, modify, and redistribute the data under our license.
+
+The fishtank and fusion/magField datasets were removed. These are standard
+flow testing data sets that are commonly distributed. However, we could not
+track down the original source and license, so to be cautious these data
+sets have been removed and replaced with some generated in house.
+
+For some of the other data sets, we have traced down the original author
+and verified that they propery contribute the data to VTK-m and agree to
+allow it to be distributed under VTK-m's license. Not counting the most
+trivial examples, here are the originators of the non-trivial data
+examples.
+
+* **5x6_&_MC*.ctm** and **8x9test_HierarchicalAugmentedTree*.dat**: Hamish
+  Carr
+* **warpXfields.vtk** and **warpXparticles.vtk**: Axel Huebl
+* **amr_wind_flowfield.vtk**: James Kress
+* **DoubleGyre*.vtk**: James Kress
+* **venn250.vtk**: Abhishek Yenpure
+* **wedge_cells.vtk**: Chris Laganella
+* **kitchen.vtk**: Copyright owned by Kitware, Inc. (who shares the
+  copyright of VTK-m)
+