37.2 Semi-Structured and Unstructured Data
https://en.wikipedia.org/wiki/Data_model https://www.educba.com/semi-structured-data/ https://en.wikipedia.org/wiki/Semi-structured_data https://en.wikipedia.org/wiki/Unstructured_data https://www.purestorage.com/tw/knowledge/big-data/structured-vs-unstructured-data.html