Practical guides / synthetic data

Understand the file first.

Small examples, explicit interpretations and useful boundaries. These guides don’t require Prooftable or pretend an unbuilt app has buttons.

01 / IDENTIFIERS

Preserve leading-zero IDs

CSV has no type declaration. Prevent an importer from turning 0017 into 17.

02 / STRUCTURE

Separate physical lines from logical records and spot a missing field.

03 / WHITESPACE

Make the character rule and operation order visible before changing values.