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An extensible file format for storage of neuroimaging data:

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JNIfTI Format Specification Development Guide

We use this repository to gather feedback from the community regarding the "JNIfTI Format Specification", or JNIfTI format. Such feedback is crucial to finalize this file specification and help improve it in the future once disseminated.

The latest version of the JNIfTI specification can be found in the file named JNIfTI_specification.md. The specification is written in the Markdown format for convenient editing and version control.

The JNIfTI format is built upon the JData specification - a generalized framework to serialize and convert complex scientific data. The JNIfTI specification is compatible with JData specification Draft 3.

How to participate

You can use a number of methods to provide your feedback to the working draft of this file specification, including

  • Create an "Issue"
    • This is the most recommended method to provide detailed feedback or discussion. An "Issue" in github is highly versatile. One can ask a question, report a bug, provide a feature request, or simply propose general discussions. Please use URLs or keywords to link your discussion to a specific line/section/topic in the document.
  • Write short comments on Request for Comments (RFC) commits
    • A milestone version of the specification will be associated with an RFC (Request for comments) commit (where the entire file is removed and re-added so that every line appears in such comment). One can write short comments as well as post replies on this RFC page.
    • To add a comment, you need to first register a github account, and then browse the above RFC page. When hovering your cursor over each line, a "plus" icon is displayed, clicking it will allow one to comment on a specific line (or reply to other's comments).
    • The RFC page can get busy if too many comments appear. Please consider using the Issues section if this happens.
    • One can browse the commit history of the specification document. If anyone is interested in commenting on a particular updated, you can also comment on any of the commit page using the same method.
  • Use NeuroJSON mailing list
    • You may send your comments to the neurojson mailing list (neurojson at googlegroups.com). Subscribers will discuss by emails, and if a motion is reached, proposals will be resubmitted as an Issue, and changes to the specification will be associated with this issue page.

For anyone who wants to contribute to the writing or revision of this document, please follow the below steps

  • Fork this repository and make updates, then create a pull-request
    • Please first register an account on github, then, browse the JNIfTI repository; on the top-right of this page, find and click the "Fork" button.
    • once you fork the JNIfTI project to your own repository, you may edit the files in your browser directly, or download to your local folder, and edit the files using a text editor;
    • once your revision is complete, please "commit" and "push" it to your forked git repository. Then you should create a pull-request against the upstream repository (i.e., NeuroJSON/jnifti). Please select "Compare cross forks" and select "NeuroJSON/jnifti" as "base fork". Please write a descriptive title for your pull-request. The project maintainer will review your updates and choose to merge to the upstream files or request revision from you.