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HED

RRID:
SCR_014074
Tags:

Hierarchical Event Descriptors (HED) is an open standard and supporting ecosystem for describing experimental events, conditions, and experiment organization in a format that is both human- and machine-readable to enable analysis, re-analysis, and meta/mega analysis. HED is particularly relevant for neuroimaging and behavioral experiments where events are a central organizing focus for analysis.

Links:

HED Homepage
HED specification
HED on GitHub (src)

Publications:

  • Hierarchical Event Descriptor library schema for clinical EEG data annotation. (arXiv)

  • Building FAIR functionality: Annotating events in time series data using  Hierarchical Event Descriptors (HED). Neuroinformatics Special Issue Building the NeuroCommons. Neuroinformatics  (2022). https://doi.org/10.1007/s12021-021-09537-4

  • Automated EEG mega-analysis II: Cognitive aspects of event related features. NeuroImage. 2019 Sep 4:116054. doi: 10.1016/j.neuroimage.2019.116054, PMID:  31491523.

Supporting software

Supporting software

Specification 
doi.org/10.5281/zenodo.7869149 (DOI) 
hed-specification.readthedocs.io/en/latest/ (HTML) 
github.com/hed-standard/hed-specification/docs (src)

Homepage 
www.hedtags.org 
github.com/hed-standard/hed-standard.github.io (src)

HED schemas 
(vocabularies) 
www.hedtags.org/display_hed.html (viewer) 
doi.org/10.5281/zenodo.7876037 (standard schema DOI) 
doi.org/10.5281/zenodo.7897596 (score schema DOI)

Python codebase 
doi.org/10.5281/zenodoSpecification 
doi.org/10.5281/zenodo.7869149 (DOI) 
hed-specification.readthedocs.io/en/latest/ (HTML) 
github.com/hed-standard/hed-specification/docs (src)

JavaScript codebase 
doi.org/10.5281/zenodo.8172804 (DOI) 
github.com/hed-standard/hed-validator (src) 
www.npmjs.com/package/hed-validator (npm)

Documentation 
www.hed-resources.org (HTML) 
github.com/hed-standard/hed-examples/docs (src)

Example datasets  
github.com/hed-standard/hed-examples/datasets (src)

Youtube channel  
www.youtube.com/playlist?list=PLeII6cRFsP6L5S6icwRrJp0DHkhOHtbp-

Online tools  
hedtools.org (online tools) 
github.com/hed-standard/hed-web (src)

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Usage scenario

 HEDs are useful for: 

  • Performing experiments that acquire data 
  • Data annotation, organization, tagging events, etc. 
  • Applying HED tools to find and analyze data 
  • Tool development 
  • Schema building