Home U+0000 to U+007F Basic Latin
Glyph for U+005F
Source: Noto Sans

U+005F Low Line

U+005F was added to Unicode in version 1.1 (1993). It belongs to the block U+0000 to U+007F Basic Latin in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Connector Punctuation and is commonly used, that is, in no specific script. The character is also known as spacing underscore (1.0).

The glyph is not a composition. 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 4 other glyphs. In text U+005F behaves as Alphabetic regarding line breaks. It has type Other for sentence and ExtendNumLet for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “low line” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: dash, line, low dash, underdash, underline.


System Representation
UTF-8 5F
UTF-16 00 5F
UTF-32 00 00 00 5F
URL-Quoted %5F
HTML hex reference _
HTML named entity _
HTML named entity _
alias spacing underscore (1.0)
AGL: Latin-1 underscore
AGL: Latin-2 underscore
AGL: Latin-3 underscore
AGL: Latin-4 underscore
AGL: Latin-5 underscore
Adobe Glyph List underscore
digraph _

Related Characters



Complete Record

Property Value
Age 1.1 (1993)
Unicode Name LOW LINE
Block Basic Latin
General Category Connector Punctuation
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+005F Low Line
Simple Lowercase Mapping Glyph for U+005F Low Line
Lowercase Mapping Glyph for U+005F Low Line
Simple Uppercase Mapping Glyph for U+005F Low Line
Uppercase Mapping Glyph for U+005F Low Line
Simple Titlecase Mapping Glyph for U+005F Low Line
Titlecase Mapping Glyph for U+005F Low Line
Case Folding Glyph for U+005F Low Line
ASCII Hex Digit
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Full Composition Exclusion
Default Ignorable Code Point
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Extended Pictographic
FC NFKC Closure Glyph for U+005F Low Line
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
ID_Compat_Math_Continue 0
ID_Compat_Math_Start 0
InCB None
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+005F Low Line
NFKC Quick Check Yes
NFKC_SCF Glyph for U+005F Low Line
NFKD Quick Check Yes
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Sentence Break Other
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break ExtendNumLet
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+005F Low Line
Bidi Paired Bracket Type None
East Asian Width Narrow
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Alphabetic
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+005F Low Line
Script Extension
Vertical Orientation R