HED (Hierarchical Event Descriptors) is a framework for systematically describing both laboratory and real-world events. HED tags are comma-separated path strings. The goal of HED is to describe precisely the nature of the events of interest occurring in an experiment using a common language. HED, itself, is platform-independent and data-neutral. Most people will simply annotate their events by creating a spreadsheet that associates HED tags with event codes or the events themselves. If you have such a spreadsheet, you can use the HED Online Validator (http://visual.cs.utsa.edu/hed/) to validate your spreadsheet without downloading any tools.

• gollum_email converts a HED schema to an XML file (python 2)
• hedconversion converts a HED schema to an XML file to use in validation (python 3)
• hedemailer implements the web hook that emails updates of HED schema to other tools
• hedvalidation main python code for validating hed tags
• webinterface contains the code to deploy the python validator as a docker module

The hed_files_examples.py file in hedvalidation/examples shows how to validate a HED spreadsheet from a python program.

The hed_string_examples.py file in hedvalidation/examples shows how to call python HED validator functions to validate a HED string.