U+10400 "𐐀" Deseret Capital Letter Long I Unicode Character
U+10400 "𐐀" Deseret Capital Letter Long I is a letter from the Deseret alphabet, a phonetic script created in the mid-19th century by the Latter-day Saint (Mormon) community in Utah, under the direction of Brigham Young, to simplify English spelling and promote literacy. This uppercase character represents the long "I" vowel sound, as in the word "bite," and is part of the Deseret block in Unicode, which was added in version 3.1 in 2001 to preserve this historical writing system for digital use. Though the Deseret alphabet never gained widespread adoption and fell out of common use by the 1870s, its inclusion in Unicode allows scholars, historians, and enthusiasts to access and study this unique linguistic artifact in modern computing environments.
General Properties
| Code Point | U+10400 |
| Version Added | 3.1 |
| Name | Deseret Capital Letter Long I |
| Block | Deseret |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
Encodings
| HTML Decimal Encoding | 𐐀 |
| HTML Hex Encoding | 𐐀 |
| UTF-8 Encoding | 0xF0 0x90 0x90 0x80 |
| UTF-16 Encoding | 0xD801 0xDC00 |
| UTF-32 Encoding | 0x00010400 |
| C/C++/Java Escape | \ud801\udc00 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "𐐨" U+10428 Deseret Small Letter Long I |
| Lowercase Code Point | "𐐨" U+10428 Deseret Small Letter Long I |
| Simple Case Folding | "𐐨" U+10428 Deseret Small Letter Long I |
| Case Folding | "𐐨" U+10428 Deseret Small Letter Long I |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "𐐨" U+10428 Deseret Small Letter Long I |
| NFKC Simple Casefold | "𐐨" U+10428 Deseret Small Letter Long I |
| Script | Deseret |
| Script Extensions | Deseret |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |