U+00EF "ï" Latin Small Letter I with Diaeresis Unicode Character
Unicode Version 17.0
ï
U+00EF "ï" Latin Small Letter I with Diaeresis is a precomposed character that represents the letter "i" modified by a diaeresis, a diacritical mark consisting of two dots placed above it. This character is used in several languages, including French and English, where it indicates that the "i" should be pronounced separately from a preceding vowel, as in the French word "naïf" or the English word "naïve," to show that the two vowels are not part of a digraph or diphthong. In languages like Catalan, Dutch, and Afrikaans, it also appears in loanwords or specific lexical contexts to denote a similar syllabic break or a distinct phonetic value.
General Properties
| Code Point | U+00EF |
| Version Added | 1.1 |
| Name | Latin Small Letter I with Diaeresis |
| Unicode 1.0 Name | Latin Small Letter I Diaeresis |
| Block | Latin-1 Supplement |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "i" U+0069 Latin Small Letter I "̈" U+0308 Combining Diaeresis |
Encodings
| HTML Decimal Encoding | ï |
| HTML Hex Encoding | ï |
| UTF-8 Encoding | 0xC3 0xAF |
| UTF-16 Encoding | 0x00EF |
| UTF-32 Encoding | 0x000000EF |
| C/C++/Java Escape | \u00ef |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ï" U+00CF Latin Capital Letter I with Diaeresis |
| Simple Titlecase Code Point | "Ï" U+00CF Latin Capital Letter I with Diaeresis |
| Uppercase Code Point | "Ï" U+00CF Latin Capital Letter I with Diaeresis |
| Titlecase Code Point | "Ï" U+00CF Latin Capital Letter I with Diaeresis |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| Script | Latin |
| Script Extensions | Latin |
| 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 | Lower |