Get involved in making BIDS better

The easiest way to contribute to BIDS is to ask questions you have about the specification on Neurostars. If your question has a bids tag it will be much easier for others to find the answer.

You can also get involved by answering questions on Neurostars!

You can contribute to the BIDS specification by opening Issues and proposing changes via Pull Requests on GitHub.

To make improvements to the website that you are reading right now, you can also open an Issue and propose changes via Pull Requests at the BIDS website GitHub repository.

There are so many ways to help us build this community. You could help someone else learn the benefits of BIDS, give a talk in your local organisation, or build a BIDS App!

The only requirement is that everyone who contributes adheres to our BIDS Code of Conduct.

Thank you for your contributions!

Extending the BIDS specification

The BIDS specification can be extended in a backwards compatible way and will evolve over time. These are accomplished with BIDS Extension Proposals (BEPs), which are community-driven processes.

Do you want to extend BIDS to a new modality or set of data types? Please draft a BIDS Extension Proposal (BEP) following the BIDS Extension Proposals Guide.

You can also contribute to ongoing BIDS Extension Proposals. Below is a table of currently-active BEPs. The “Extension label” column provides a direct link to the documentation.

Please find our latest BEP update presented in the Open Science Room at OHBM.

Note that all of the extension ideas that are not backwards compatible and thus will have to wait for BIDS 2.0 are listed on the Issues page of the bids-2-devel GitHub repository.

Extension label Title Moderators / leads Summary Blocking point(s)
BEP002 The BIDS Models Specification Tal Yarkoni and Chris Markiewcz Reworked structure - list of steps is now a directed,graph, Model zoo, Abstracted transformations, to ease interoperability of implementations Stat Models released v1.0.0-rc1 in June 2021 - Please review!
BEP004 Susceptibility Weighted Imaging (SWI)   Looking for a new leader. Searching for a new leader.
BEP011 The structural preprocessing derivatives Viviana Siless Features Surfaces, Scalar maps on Surfaces, and Morphometrics. Opened pull request. Need to conform with final Common Derivatives and gather community feedback. Blocked by BIDS-validator extending and PyBIDS implementation for common derivatives
BEP012 The functional preprocessing derivatives Chris Markiewicz Opened the pull request. Features Derivative images (mean, ALFF, ReHo, etc.), Time series (confounds, decompositions, etc.) Blocked by BIDS-validator extending and PyBIDS implementation
BEP013 The resting state fMRI derivatives Steven Giavasis Merged into BEP012. None.
BEP014 The affine transformations and nonlinear field warps Oscar Esteban Creating file format (X5) to store spatial transforms. There is a software prototype - NiTransforms demonstrates implementation of this BEP. NiTransforms has been tested and integrated to work within fMRIPrep In progress.
BEP016 The diffusion weighted imaging derivatives Franco Pestilli and Oscar Esteban Being discussed here. Coordinating with BEP017. Difussion-weighted model description merged, but must comply to this. Upcoming integration across DWI, Tractography, Tractometry, and Connectivity (from fMRI and DWI) None.
BEP017 Generic BIDS connectivity data schema Eugene Duff Current state. Intended as a meeting point for minimal harmonisation of connectivity-based formats across modalities. Seeking use cases spanning modalities and input defining connectivity based formats None.
BEP019 DICOM Metadata Satrajit Ghosh Not active. Could be a NIDM extension rather than in BIDS. None.
BEP020 Eye Tracking including Gaze Position and Pupil Size (ET) Dejan Draschkow BEP close to PR submission, examples and validator under development. Seeking additional BEP lead to help incoporate into standard contact dejan to get involved. None.
BEP021 Common Electrophysiological Derivatives Stefan Appelhoff, Arnaud Delorme, Dora Hermes, Mainak Jas, Guiomar Niso, Robert Oostenveld, and Cyril Pernet Discussion here UCSD to include head models with BIDS EEG data. Developments of BIDS M/EEG pipelines will trigger discussion on storing derived data. Mostly on hold.
BEP022 Magnetic Resonance Spectroscopy (MRS) Mark Mikkelsen, William Clarke and Martin Wilson Group discussions here and here. Developed NifTI standard for MRS data - presented abstract at ISMRM; manuscript in preparation. None.
BEP023 PET Preprocessing derivatives Martin Noergaard, Graham Searle, Melanie Ganz Work in progress following BEP009 incorporation into spec. Coord. kickoff scheduled Sept. 2021 to capture various experimental designs and needs for preprocessing and pharmacokinetic modeling. Focused on staying aligned with derivatives for MRI (structural, functional, ASL, diffusion) Progressing and soliciting input from senior PET experts.
BEP024 Computed Tomography scan (CT) Hugo Boniface Lead seeking more contributors and experts. None.
BEP025 Medical Imaging Data structure (MIDS) Jose Manuel Saborit Torres, and Maria de la Iglesia Vayá Enhancing BEP025 preprint. Provided automated tool to convert projects uploaded to XNAT platforms to BIDS/MIDS. Example datasets: Massive Image Data Anatomy Spine, BIMCV-COVID19+, and BIMCV-COVID19-. Included Kaggle Challenge SIIM-FISABIO-RSNA COVID-19 Detection None.
BEP026 Microelectrode Recordings   BEP is open to new leadership, see also BEP032 (animal electrophys) Searching for a new leader.
BEP027 BIDS Applications 2.0 Chris Markiewicz and Greg Kiar Focusing on: command-line conventions, I/O interface descriptors, and common behavior (e.g., exit codes for failure modes); relies upon the Boutiques standard. Re-conception of BIDS Apps None.
BEP028 Provenance Satra Ghosh and Camille Maumet BEP aims to provide a description of data manipulation and transformations steps related to a BIDS data element via BIDS structured sidecar JSON-LD files. Can be used to describe provenance at different levels of granularity. Dicussions held inthis repository. A set of examples and user stories are being refined. None.
BEP029 Virtual and physical motion data Sein Jeung and Julius Welzel BEP is developing and starting to finalize as discussions concerning example datasets are completed. None.
BEP030 Near Infrared Spectroscopy (NIRS) Robert Luke and Luca Pollonini BEP presented at the society for fNIRS conference. Have developed SNRIF data format. Opened as pull request. Primarily for continuous wave NIRS (CW-NIRS), but want to ensure not to preclude future extensions. Examples and validator efforts in progress. Inviting colleagues from time- and frequency-domain fNIRS to review proposal. None.
BEP032 Animal electrophysiology Sylvain Takerkart and Julia Sprenger New BEP, collecting comments and community feedback which may be submitted here, directly to Sylvain & Julia, or here during the ~monthly meeting. Example datasets here. Supporting early stage interaction with: ProbeInterface & SpikeInterface, AnDO, Interoperability with NWB and NIX data/metadata formats. None.
BEP033 Advanced Diffusion Weighted Imaging (aDWI) James Gholam, Leandro Beltrachini, and Filip Szczepankiewicz New BEP, seeking contributors and collecting community feedback relating to: priority sequences to support, best supported binary structured formats (e.g. CBOR? HDF5? MsgPack?) Comments may be submitted directly on the document. Generating example datasets here and Determining best practice w/ vendors to record data in-sequence None.
BEP034 Computational modeling Michael Schirner and Petra Ritter BEP Computational Models: PR open for review and discussion here. None.
BEP035 Modular extensions for individual participant data mega-analyses with non-compliant derivatives Giuseppe Gallitto, Balint Kincses, and Tamas Spisak BEP revised: now collecting further comments and community feedback. Collaborators with mega-analysis experience or with actual example use-cases (planned/ongoing/finished mega analyses) welcome! None.
BEP036 Phenotypic Data Guidelines Eric Earl and Samuel Guay BEP drafted. Poster presentation at OHBM 2022. Now collecting community comments and feedback. All collaborators are welcome. More reviews and discussions are necessary.
BEP037 Non-Invasive Brain Stimulation (NIBS) Giacomo Bertazzoli, Vittorio Iacovella, Carlo Miniussi and Marta Bortoletto New BEP, collecting community comments and feedback. All collaborators are welcome. None

Completed BEPs

When an extension reaches maturity it is merged into the main body of the specification. Below is a table of BEPs that have been merged.

Extension label Title Moderators/leads
BEP001 Quantitative MRI (qMRI) Gilles de Hollander and Kirstie Whitaker
BEP003 Common Derivatives Chris Markiewicz
BEP005 Arterial Spin Labeling (ASL) Henk-Jan Mutsaerts, Patricia Clement, Jan Petr, and Marco Castellaro
BEP006 Electroencephalography (EEG) Cyril Pernet, Stefan Appelhoff, and Robert Oostenveld
BEP007 Hierarchical Event Descriptor (HED) Tags Chris Gorgolewski
BEP008 Magnetoencephalography (MEG) Guiomar Niso
BEP009 Positron Emission Tomography (PET) Melanie Ganz
BEP010 intracranial Electroencephalography (iEEG) Chris Holdgraf and Dora Hermes
BEP018 Genetic information Cyril R Pernet, Clara Moreau, and Thomas Nichols
BEP031 Microscopy Marie-Hélène Bourget and Julien Cohen-Adad

Some proposals that set out to extend the BIDS specification have instead become tools for handling BIDS. See the table below.

Extension label Title Moderators/leads Tool name
BEP015 Mapping file Eric Earl, Camille Maumet, and Vasudev Raguram File mapper