U+00CF was added to Unicode in version 1.1 (1993). It belongs to the block Latin-1 Supplement in the Basic Multilingual Plane.

This character is a Uppercase Letter and is mainly used in the Latin script. It is related to its lowercase variant ï.

The glyph is a Canonical composition of the glyphs I ̈. It has a Neutral East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+00CF behaves as Alphabetic regarding line breaks. It has type Upper for sentence and ALetter for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

Ï, lowercase ï, is a symbol used in various languages written with the Latin alphabet; it can be read as the letter I with diaeresis or I-umlaut.

In Ukrainian, Afrikaans, Catalan, Dutch, French, Galician, Welsh, Southern Sami, and occasionally English, ⟨ï⟩ is used when ⟨i⟩ follows another vowel and indicates hiatus (diaeresis) in the pronunciation of such a word—that is, it indicates that the two vowels are pronounced in separate syllables, rather than together as a diphthong or digraph. For example, French maïs (IPA: [ma.is], maize); without the diaeresis, the ⟨i⟩ is part of the digraph ⟨ai⟩: mais (IPA: [mɛ], but). The letter is also in Dutch Oekraïne (pronounced [ukraːˈinə], Ukraine), and English naïve (/nɑːˈiːv/ or /naɪˈiːv/).

In scholarly writing on Turkic languages, ⟨ï⟩ is sometimes used to write the close back unrounded vowel /ɯ/, which in standard modern Turkish orthography is written as the dotless i ⟨ı⟩. The back neutral vowel reconstructed in Proto-Mongolic is sometimes written ⟨ï⟩.

In the transcription of the languages of the Amazon, ï is used to represent the high central vowel [ɨ].

  1. ^ Marcel Erdal, A Grammar of Old Turkic, Handbook of Oriental Studies 3, ISBN 9004102949, 2004, p. 52
  2. ^ Juha Janhunen, ed., The Mongolic Languages ISBN 0415681545, p. 5


System Representation
UTF-8 C3 8F
UTF-16 00 CF
UTF-32 00 00 00 CF
URL-Quoted %C3%8F
HTML-Escape Ï
Wrong windows-1252 Mojibake Ï
HTML-Escape Ï
digraph I:
LaTeX \"{I}
Encoding: ISO-8859-10 (hex bytes) CF
Encoding: ISO-8859-14 (hex bytes) CF
Encoding: ISO-8859-15 (hex bytes) CF
Encoding: ISO-8859-16 (hex bytes) CF
Encoding: ISO-8859-3 (hex bytes) CF
Encoding: MACINTOSH (hex bytes) EC
Encoding: WINDOWS-1252 (hex bytes) CF
Encoding: WINDOWS-1254 (hex bytes) CF
Encoding: WINDOWS-1258 (hex bytes) CF

Related Characters

  • ï
  • Ḯ


Complete Record

Property Value
Age (age) 1.1
Block (blk) Latin_1_Sup
General Category (gc) Uppercase Letter
Script (sc) Latin
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) Canonical
Decomposition Mapping (dm) I ̈
Lowercase (Lower)
Simple Lowercase Mapping (slc) ï
Lowercase Mapping (lc) ï
Uppercase (Upper)
Simple Uppercase Mapping (suc) Ï
Uppercase Mapping (uc) Ï
Simple Titlecase Mapping (stc) Ï
Titlecase Mapping (tc) Ï
Case Folding (cf) ï
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) Ï
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Neutral
Extender (Ext)
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
Line Break (lb) Alphabetic
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) No
NFKC Casefold (NFKC_CF) ï
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) No
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) Upper
Simple Case Folding (scf) ï
Script Extension (scx) Latin
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) ALetter
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)