6 - Exercise Summary

✅ What you built

1. A Datasource Project: Passengers project.
2. A passengers_logic Code Repository.
3. Python transforms that create “local” project copies of the raw, unparsed JSON and CSV files.
4. “Raw” dataset files built on the Master branch.

✅ What you learned

• Foundry datasets are most often composed of Parquet ↗ files, which are optimized for Spark.
• Datasets can contain raw CSV and JSON files without a schema.
• The Foundry Explorer helper is a file navigation interface that lets you quickly browse all files and folders and preview selected datasets.