I apologize if this is a dumb question, but I've never seen a recommendation for using Arabic letters and numbers before. Is that common in your field?
It's outrageous what journals will accept for supplemental data tables. Nothing is worse than a pdf print of a MS Word table with no consistent tab delineations, mix of numbers and words in columns, no key or units, inscrutable sample numbering system, etc.
Comments
What about parquet?
https://en.wikipedia.org/wiki/Apache_Parquet
https://parquet.apache.org/