App Structure

1. Upload
   • get a participants.tsv file from the user
   • (optional) get a participants.json data dictionary from the user
   • parse and store uploaded data in global store
2. Categorization
   • go through each column of the participants.tsv file and map to one of 5 categories
   • categories: ['subjectID', 'Age', 'Sex', 'Diagnosis', 'Assessment tool']
   • only 'subjectID' is mandatory (according to BIDS)
3. Annotation
   • for each category that was mapped in the previous step (other than 'subjectID'):
   • provide additional mappings of the values.
   • e.g. for "age", bring all age values into a common format
   • e.g. for "Diagnosis", map all values into the SNOMED-CT format
4. Download
   • export the annotated data to the user