Data Dictionary Generator — illustrative example INPUT Document lead_time_days. Confirmed facts: integer; expected calendar days from order acceptance to delivery; nonnegative; blank means estimate unavailable; source is supplier estimate. RESULT Field: lead_time_days Meaning: estimated calendar days from accepted order to delivery. Type: integer. Unit: calendar days. Allowed values: 0 or greater. Missing value: blank = estimate unavailable. Source: supplier estimate. Example: 7 means an estimated seven calendar days, not seven working days. REVIEW A data dictionary should describe meaning as well as type. Include units, allowed values and how missing information is represented. This is a teaching example, not a live execution record.