Style guide: European Portuguese, `pt` (metadata only)

1. Standard and spelling

European Portuguese, current orthography (Acordo Ortográfico de 1990, as used by Lusa and the Portuguese press): ação, direção, ótimo, months and weekdays in lower case (julho, segunda-feira).
Never Brazilian forms: registo (not registro), facto (not fato), equipa, comboio, autocarro; está a construir (not está construindo); no você.
Quotations from the source keep their 1921/1940 spelling inside «…»; everything else is modern.

2. Register and tone

Clear, sober prose of a modern Portuguese reference work (the register of a good encyclopedia or a museum text). No juridiquês, no heavy nominal chains.
Narrative past: pretérito perfeito (foi fundada, governou). Present only for what is still true.
The edition's own voice is impersonal (refere-se, descreve-se), not "nós".

3. Names — restore the Portuguese original (most important rule)

The English metadata uses English forms and adds meaning glosses for foreign readers. In Portuguese, every name goes back to its Portuguese original form, and the glosses are dropped:

exonyms back to Portuguese: Lisbon → Lisboa, the Azores → os Açores, Oporto → Porto, the Canaries → as Canárias, Seville → Sevilha, London → Londres;
historical figures in their Portuguese form: Henry the Navigator → Infante D. Henrique, King Manuel I → D. Manuel I, the Marquis of Pombal → Marquês de Pombal, Philip II of Spain → Filipe II de Espanha (Filipe I de Portugal);
religious dedications, chapels, churches, feasts in Portuguese: the chapel of Our Lady of Pity → Capela de Nossa Senhora da Piedade, Saint Vincent → São Vicente;
titles of works and periodicals in Portuguese as published: Longing for the Homeland → Saudades da Terra;
drop meaning glosses and translations in parentheses that exist only for foreign readers: "Curral das Freiras (‘the nuns’ pen’)" → Curral das Freiras; "the Câmara Municipal (town council)" → a Câmara Municipal;
Madeiran toponyms in their modern official spelling: Câmara de Lobos, Porto Moniz, Santana, Fajã da Ovelha. Personal names as printed in the encyclopedia's own headings (Gaspar Frutuoso, João Gonçalves Zarco).
Honorifics as in Portuguese: D. (Dom/Dona), Dr., Padre, Frei, Cónego, Conde de….

4. Terms

Madeiran and Portuguese terms are ordinary Portuguese words here: freguesia, concelho, sítio, levada, fajã, achada, lombo, poio, palheiro, morgado, capitão-donatário, Câmara Municipal — no italics, no glosses.
Historical institutions and offices by their Portuguese names (Junta Geral, Provedor da Fazenda, Misericórdia).

5. Punctuation and typography

Quotation marks: « » (aspas angulares) for primary quotations, “ ” inside them.
Dash: spaced en dash ( – ). Ranges: 1834–1836.
Titles of works and periodicals in italics (Saudades da Terra, Diário de Notícias).

6. Numbers, dates, money

Thousands separated by a space from five digits (12 500; 1 436 305); decimal comma (756,2). Years never grouped.
Dates: 9 de julho de 1891; em 1640, cerca de 1640; centuries século XVI.
Ordinals: 1.º, 2.ª; regnal numbers D. João I, Filipe II.
Money as in Portugal: réis, mil-réis, contos de réis, escudos, centavos (no glosses). Order: "20 000 réis", "4,20 escudos".
Units: 12 km, 648 500 kg, 8 °C (space before the symbol); percentages 58,8 %.

7. Examples

EN: "Parish in the municipality of Calheta, on the south-west coast; its levadas (irrigation channels) include the Levada Nova." → PT: "Freguesia do concelho da Calheta, na costa sudoeste; entre as suas levadas conta-se a Levada Nova."
EN: "Governor of Madeira (1834–36), noted for reorganising the customs service after the Liberal victory." → PT: "Governador da Madeira (1834–1836), lembrado por ter reorganizado a alfândega após a vitória liberal."
EN: "Chapel of Our Lady of Pity (Nossa Senhora da Piedade) at Caniçal, rebuilt in 1664." → PT: "Capela de Nossa Senhora da Piedade, no Caniçal, reconstruída em 1664."
EN: "Henry the Navigator granted the captaincy of Funchal to Zarco in 1450." → PT: "O Infante D. Henrique doou a capitania do Funchal a Zarco em 1440."