Home: go to the homepage U+0080 to U+00FF Latin-1 Supplement
Glyph for U+00A8
Source: Noto Sans

U+00A8 Diaeresis

U+00A8 was added in Unicode version 1.1 in 1993. It belongs to the block U+0080 to U+00FF Latin-1 Supplement in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Modifier Symbol and is commonly used, that is, in no specific script.

The glyph is a compatibility composition of the glyphs Glyph for U+0020 Space, Glyph for U+0308 Combining Diaeresis. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. If its East Asian Width is “narrow”, U+00A8 forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts.

The CLDR project calls this character “diaeresis” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: tréma, umlaut.

The Wikipedia has the following information about this codepoint:

Diacritical marks of two dots ¨, placed side-by-side over or under a letter, are used in a number of languages for several different purposes. The most familiar to English-language speakers are the diaeresis and the umlaut, though there are numerous others. For example, in Albanian, ë represents a schwa. Such diacritics are also sometimes used for stylistic reasons (as in the family name Brontë or the band name Mötley Crüe).

In modern computer systems using Unicode, the two-dot diacritics are almost always encoded identically, having the same code point. For example, U+00E4 ä LATIN SMALL LETTER A WITH DIAERESIS represents both a-umlaut and a-diaeresis. Their appearance in print or on screen may vary between typefaces but rarely within the same typeface.

Representations

System Representation
168
UTF-8 C2 A8
UTF-16 00 A8
UTF-32 00 00 00 A8
URL-Quoted %C2%A8
HTML hex reference ¨
Wrong windows-1252 Mojibake ◌¨
HTML named entity ¨
HTML named entity ¨
HTML named entity ¨
HTML named entity &uml
HTML named entity ¨
Encoding: EUC-KR (hex bytes) A1 A7
Encoding: ISO-8859-2 (hex bytes) A8
Encoding: ISO-8859-3 (hex bytes) A8
Encoding: ISO-8859-4 (hex bytes) A8
Encoding: ISO-8859-7 (hex bytes) A8
Encoding: ISO-8859-8 (hex bytes) A8
Encoding: JIS0208 (hex bytes) A1 AF
Encoding: MACINTOSH (hex bytes) AC
Encoding: WINDOWS-1250 (hex bytes) A8
Encoding: WINDOWS-1252 (hex bytes) A8
Encoding: WINDOWS-1253 (hex bytes) A8
Encoding: WINDOWS-1254 (hex bytes) A8
Encoding: WINDOWS-1255 (hex bytes) A8
Encoding: WINDOWS-1256 (hex bytes) A8
Encoding: WINDOWS-1257 (hex bytes) 8D
Encoding: WINDOWS-1258 (hex bytes) A8
LATEX \textasciidieresis
AGL: Latin-1 dieresis
AGL: Latin-2 dieresis
AGL: Latin-3 dieresis
AGL: Latin-4 dieresis
AGL: Latin-5 dieresis
Adobe Glyph List dieresis
digraph ':

Related Characters

Elsewhere

Complete Record

Property Value
Age (age) 1.1 (1993)
Unicode Name (na) DIAERESIS
Unicode 1 Name (na1) SPACING DIAERESIS
Block (blk) Latin-1 Supplement
General Category (gc) Modifier Symbol
Script (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Decomposition Type (dt) compatibility
Decomposition Mapping (dm) Glyph for U+0020 Space Glyph for U+0308 Combining Diaeresis
Lowercase (Lower)
Simple Lowercase Mapping (slc) Glyph for U+00A8 Diaeresis
Lowercase Mapping (lc) Glyph for U+00A8 Diaeresis
Uppercase (Upper)
Simple Uppercase Mapping (suc) Glyph for U+00A8 Diaeresis
Uppercase Mapping (uc) Glyph for U+00A8 Diaeresis
Simple Titlecase Mapping (stc) Glyph for U+00A8 Diaeresis
Titlecase Mapping (tc) Glyph for U+00A8 Diaeresis
Case Folding (cf) Glyph for U+00A8 Diaeresis
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Composition Exclusion (CE)
Case Ignorable (CI)
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)
Cased (Cased)
Full Composition Exclusion (Comp_Ex)
Default Ignorable Code Point (DI)
Dash (Dash)
Deprecated (Dep)
Diacritic (Dia)
Emoji Modifier Base (EBase)
Emoji Component (EComp)
Emoji Modifier (EMod)
Emoji Presentation (EPres)
Emoji (Emoji)
Extender (Ext)
Extended Pictographic (ExtPict)
FC NFKC Closure (FC_NFKC) Glyph for U+00A8 Diaeresis
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Grapheme Link (Gr_Link)
Hex Digit (Hex)
Hyphen (Hyphen)
ID Continue (IDC)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideographic (Ideo)
InCB (InCB) None
Indic Mantra Category (InMC)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN)
Join Control (Join_C)
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) Glyph for U+0020 Space Glyph for U+0308 Combining Diaeresis
NFKC Quick Check (NFKC_QC) No
NFKC_SCF (NFKC_SCF) Glyph for U+0020 Space Glyph for U+0308 Combining Diaeresis
NFKD Quick Check (NFKD_QC) No
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)
Prepended Concatenation Mark (PCM)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Regional Indicator (RI)
Radical (Radical)
Sentence Break (SB) Other
Soft Dotted (SD)
Sentence Terminal (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Other
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)
Bidi Paired Bracket (bpb) Glyph for U+00A8 Diaeresis
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) ambiguous
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Ambiguous (Alphabetic or Ideographic)
Numeric Type (nt) none
Numeric Value (nv) not a number
Simple Case Folding (scf) Glyph for U+00A8 Diaeresis
Script Extension (scx)
Vertical Orientation (vo) R