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Annotations Eh?

Traditional annotations are marginalia, errata, and highlights in printed books, schemas, picture, and other physical media. Open Annotations are an attempt to recreate and extend that functionality as a new layer of interactivity and linking on top of the fabric of reality.

It will allow anyone to annotate anything anywhere, be it a pdf, an timeline, a video, an image, a 3d model, an audio stream, or data in raw or visualized form. Open Annotations can be linked, shared between services, tracked back to their origins, searched and discovered, and stored wherever the author wishes; the vision is for a decentralized and open annotation infrastructure.

Dive in now Star the Github repo

About the project

OpenAnnotationIO was initiated by Ahead.IO with the primary aim to create a standard description framework for sharing annotations between systems.


OpenAnnotationIO is distributed with APACHE license.


When contributing to this repository, please first discuss the change you wish to make via issue, email, or any other method with the owners of this repository before making a change. Read more about becoming a contributor in our GitHub repo.

Thank you to the contributors of OPENANNOTATIONIO!

    Code of Conduct

    OpenAnnotationIO is committed to fostering a welcoming community.

    View our Code of Conduct on our GitHub repository.