Lucas Reis. What is a data dictionary and why you should have one (3:19)
Open Science Framework (OSF) describe a data dictionary as
A data dictionary describes and documents elements in your data or spreadsheets such as:
A 'ReadMe file' “is a text file that introduces and explains a project. It contains information that is commonly required to understand what the project is about.” https://www.makeareadme.com/
Other resources
https://datamanagement.hms.harvard.edu/collect-analyze/documentation-metadata/readme-files
https://data.4tu.nl/s/documents/Guidelines_for_creating_a_README_file.pdf
https://research-hub.auckland.ac.nz/guide-to-managing-research-data/organising-and-describing-data/research-data-readme