01Where else it exists
- Local presence(Marginal → Widespread)
- Exported from Brazil(Marginal → Widespread)
- Brazil
- Absent (checked)
- No data
Sovereign projection: Equal Earth centered on 60° W, south up, as on IBGE's world maps. Colonial projection: Equal Earth. Places with uncertain presence take the color of the highest possible level; the table shows the full range.
Place (1)
| Place | Presence | Weight | Sources |
|---|---|---|---|
| South Africa | Regional | 0.5 | [1] |
| Presence abroad | 0.5 | ||
02What exactly is being measured
Sockets and plugs following the Brazilian three-round-pin standard, mandatory in new installations.
03Context
The regulation made the standard mandatory [1].
04How we got this number
- Presence abroad
Sum of each place's weight: widespread = 1, regional = 0.5, marginal = 0.1. Where it only exists as a Brazilian export, the weight is multiplied by 0.5.
- 0.5
- Exclusivity E
From 0 (exists everywhere) to 1 (only in Brazil), on a log scale.
- 0.91
- Intensity I
How much more common it is in Brazil than in the other places where it exists.
Mandatory national standard in Brazil; abroad, partial adoption in one country (fictional data). [1]
- 3–4 of 4
- Rarity coefficient R
R = E + 0.5 × (I ÷ 4) × (1 − E)
R = 0.91 + 0.5 × (3.5 ÷ 4) × (1 − 0.91) = 0.95
- 0.95
- Jabuticaba Index®
- 95% (95–96%)
Not part of the score
How aware Brazilians are that this is rare abroad.
Known for the complaints, not for its rarity. editorial judgment
2 of 4
Computed from source types: from A (official and academic data) to D (editorial judgment). It does not change the index.
A
05Sources
- [1]
Decreto Fictício nº 0.000, de 1º de abril de 2020
Diário Oficial Imaginário · Apr 1, 2020 · Official document · in Portuguese
example.org/fictional-decree · accessed Sep 25, 2026