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wiki/hierarchical_data_format.md

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+# Hierarchical Data Format
+
+Hierarchical Data Format - or in short HDF - is a file format to organize data in a hierarchical
+way.
+
+## Viewer
+
+There are various possible viewers for `.hdf` files.
+The following list contains some of them.
+
+- [HDFView](https://github.com/HDFGroup/hdfview) is a graphical viewer for `.hdf` files.
+    It also features the ability to plot data.
+- [ViTables](https://github.com/uvemas/ViTables) is a graphical viewer for `.hdf` files.
+    Contrary to other viewers it does not feature plotting data and is relatively simple.