C53 · Reference edition 2026.11
Missing and uncertain values — Comparison and alternatives
Not observed, not recorded and uncertain are different states. They should remain distinguishable from a numeric zero.
Scope and purpose
Compare alternatives using the same question and context. A difference in wording, layout or scale is not automatically a difference in performance. Keep the original observations available and explain which differences are meaningful for this comparison.
Working notes
This atlas connects descriptive vocabulary, observation context and reference-sheet design. All example records are synthetic and exist to explain a method of documentation; they do not represent tested batches, product ratings or scientific results. The diagrams are original editorial graphics. Descriptions of perceived character are kept separate from ingredient, origin, health and certification claims. Read definitions and scale anchors before comparing records.
Practical example
Use separate status fields for missing context and uncertain attribute interpretation.
| Reference record | Interpretation |
|---|---|
| C53 | Missing and uncertain values |
| Scope and purpose | Not observed, not recorded and uncertain are different states. They should remain distinguishable from a numeric zero. |
| Limits and interpretation | A blank cell must not silently become a zero in a later chart. |
Review checklist
State the comparison question; align context and labels; list common features separately from differences; leave unsupported conclusions open.