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What belongs in a certificate data dictionary

A certificate data dictionary defines what each field means, its format and how missing or qualified values are represented. It turns a downloadable table into an interpretable dataset.

For research use only. Not for human or veterinary use.

Definitions should resolve practical ambiguities: whether date means reported or tested, whether purity is a number or source text, and whether one row means one file or one distinct certificate. Include examples without inventing analytical results.

Reading checklist

Define the row unit
Define dates and measurement bases
Specify missing-value and qualifier handling

Reference: Certificate report identifiers.

Sources and further reading

Eon certificate archive

External references explain terminology and methods. They do not certify Eon products or establish suitability for human or veterinary use.