Data basics

Data dictionary

A document that lists the fields in a dataset and what each one means.

  • Data basics

Definition

A document that lists the fields in a dataset and what each one means. It often also gives each field's type and units. It helps everyone read the data the same way.

Example

Nord Signal's dictionary would say which passes count as scheduled. Passes a customer cancels are left out. So are test and demonstration passes.

Nord Signal AB is a fictional company created for Insyt.

For your role

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Why it matters

It saves hours of guesswork about what a field actually holds.

Where it is used

Data platforms, catalogues and engineering documentation.