U+00AF 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 Modifier Symbol and is commonly used, that is, in no specific script. The character is also known as overline and APL overbar.

The glyph is a Compat composition of the glyphs  ̄. It has a Narrow East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. The glyph can, under circumstances, be confused with 10 other glyphs. In text U+00AF behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

A macron (/ˈmækrɒn, ˈmeɪ-/) is a diacritical mark, a straight bar ( ¯ ) placed above a letter, usually a vowel. Its name derives from the Greek makrón (μακρόν) meaning "long" and was originally used to mark long or heavy syllables in Greco-Roman metrics. It now more often marks a long vowel. In the International Phonetic Alphabet, the macron is used to indicate a mid-tone; the sign for a long vowel is instead a modified triangular colon ⟨ː⟩.

The opposite is the breve ⟨˘⟩, which marks a short or light syllable or a short vowel.


System Representation
UTF-16 00 AF
UTF-32 00 00 00 AF
URL-Quoted %C2%AF
HTML-Escape ¯
Wrong windows-1252 Mojibake ¯
HTML-Escape ¯
HTML-Escape ¯
digraph 'm
alias overline
alias APL overbar
LaTeX \textasciimacron
Encoding: ISO-8859-15 (hex bytes) AF
Encoding: ISO-8859-4 (hex bytes) AF
Encoding: ISO-8859-8 (hex bytes) AF
Encoding: MACINTOSH (hex bytes) F8
Encoding: WINDOWS-1252 (hex bytes) AF
Encoding: WINDOWS-1254 (hex bytes) AF
Encoding: WINDOWS-1255 (hex bytes) AF
Encoding: WINDOWS-1256 (hex bytes) AF
Encoding: WINDOWS-1257 (hex bytes) 9D
Encoding: WINDOWS-1258 (hex bytes) AF

Related Characters

  •  ̄


  • ˉ
  • ¯
  • ъ
  • ‾
  • ▔
  • ﹉
  • ﹊
  • ﹋
  • ﹌
  •  ̄


Complete Record

Property Value
Age (age) 1.1
Unicode Name (na) MACRON
Unicode 1 Name (na1) SPACING MACRON
Block (blk) Latin_1_Sup
General Category (gc) Modifier Symbol
Script (sc) Common
Bidirectional Category (bc) Other Neutral
Combining Class (ccc) Not Reordered
Decomposition Type (dt) Compat
Decomposition Mapping (dm)  ̄
Lowercase (Lower)
Simple Lowercase Mapping (slc) ¯
Lowercase Mapping (lc) ¯
Uppercase (Upper)
Simple Uppercase Mapping (suc) ¯
Uppercase Mapping (uc) ¯
Simple Titlecase Mapping (stc) ¯
Titlecase Mapping (tc) ¯
Case Folding (cf) ¯
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) ¯
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) Narrow
Extender (Ext)
FC NFKC Closure (FC_NFKC) ¯
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) Yes
NFKC Casefold (NFKC_CF)  ̄
NFKC Quick Check (NFKC_QC) No
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) Other
Simple Case Folding (scf) ¯
Script Extension (scx) Common
Soft Dotted (SD)
STerm (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)