NIXIO library documentation

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C++ library for storing scientific data in the NIX data model.

The NIX data model allows to store fully annotated scientific datasets, i.e. the data together with its metadata within the same container. Our aim is to achieve standardization by providing a common/generic data structure for a multitude of data types. See the wiki or the introduction for more information.

The current implementations store the actual data using the HDF5 file format as a storage backend.

NIX emerged from the activities of the Electrophysiology Task Force of the INCF Datasharing Program (2010-2015). It is a registered research resource with the RRID:SCR_016196.


We have assembled introductory material that illustrates using nix. The tutorials contain several code examples. The use_cases explain in more detail how nix is used in real world situations.


If you need help, want to get in touch, or have any other request these are your options.

Contributing & Governance

Any kind of contribution is welcome! This includes reporting bugs and issues. If you want to contribute to code or documentation please refer to the contributing guide.


This project is open source published under the BSD-3 license see license file for details.


If you use NIX, it would be much appreciated if you would cite it in publications with its identifier RRID:SCR_016196 and/or the reference:

Stoewer A, Kellner CJ, Benda J, Wachtler T and Grewe J (2014). File format and library for neuroscience data and metadata. Front. Neuroinform. Conference Abstract: Neuroinformatics 2014. doi: 10.3389/conf.fninf.2014.18.00027

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