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U+2063 Invisible Separator

U+2063 was added to Unicode in version 3.2 (2002). It belongs to the block U+2000 to U+206F General Punctuation in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Format and is commonly used, that is, in no specific script. The character is also known as invisible comma.

The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Boundary Neutral and is not mirrored. In text U+2063 behaves as Alphabetic regarding line breaks. It has type Format for sentence and Format for word breaks. The Grapheme Cluster Break is Control.

The Wikipedia has the following information about this codepoint:

In mathematics and computer programming, index notation is used to specify the elements of an array of numbers. The formalism of how indices are used varies according to the subject. In particular, there are different methods for referring to the elements of a list, a vector, or a matrix, depending on whether one is writing a formal mathematical paper for publication, or when one is writing a computer program.

Representations

System	Representation
Nº	8291
UTF-8	E2 81 A3
UTF-16	20 63
UTF-32	00 00 20 63
URL-Quoted	%E2%81%A3
HTML hex reference	⁣
Wrong windows-1252 Mojibake	â£
HTML named entity	⁣
HTML named entity	⁣
alias	invisible comma

Elsewhere

Complete Record

Property	Value
Age	3.2 (2002)
Unicode Name	INVISIBLE SEPARATOR
Unicode 1 Name	—
Block	General Punctuation
General Category	Format
Script	Common
Bidirectional Category	Boundary Neutral
Combining Class	Not Reordered
Decomposition Type	None
Decomposition Mapping	Invisible Separator
Lowercase	✘
Simple Lowercase Mapping	Invisible Separator
Lowercase Mapping	Invisible Separator
Uppercase	✘
Simple Uppercase Mapping	Invisible Separator
Uppercase Mapping	Invisible Separator
Simple Titlecase Mapping	Invisible Separator
Titlecase Mapping	Invisible Separator
Case Folding	Invisible Separator
ASCII Hex Digit	✘
Alphabetic	✘
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	✘
Cased	✘
Full Composition Exclusion	✘
Default Ignorable Code Point	✔
Dash	✘
Deprecated	✘
Diacritic	✘
Emoji Modifier Base	✘
Emoji Component	✘
Emoji Modifier	✘
Emoji Presentation	✘
Emoji	✘
Extender	✘
Extended Pictographic	✘
FC NFKC Closure	Invisible Separator
Grapheme Cluster Break	Control
Grapheme Base	✘
Grapheme Extend	✘
Grapheme Link	✘
Hex Digit	✘
Hyphen	✘
ID Continue	✘
ID Start	✘
IDS Binary Operator	✘
IDS Trinary Operator and	✘
Ideographic	✘
Indic Mantra Category	—
Indic Positional Category	NA
Indic Syllabic Category	Other
Jamo Short Name	—
Join Control	✘
Logical Order Exception	✘
Math	✔
Noncharacter Code Point	✘
NFC Quick Check	Yes
NFD Quick Check	Yes
NFKC Quick Check	Yes
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	✘
Radical	✘
Sentence Break	Format
Soft Dotted	✘
Sentence Terminal	✘
Terminal Punctuation	✘
Unified Ideograph	✘
Variation Selector	✘
Word Break	Format
White Space	✘
XID Continue	✘
XID Start	✘
Expands On NFC	✘
Expands On NFD	✘
Expands On NFKC	✘
Expands On NFKD	✘
Bidi Paired Bracket	Invisible Separator
Bidi Paired Bracket Type	None
East Asian Width	Neutral
Hangul Syllable Type	Not Applicable
ISO 10646 Comment	—
Joining Group	No_Joining_Group
Joining Type	Transparent
Line Break	Alphabetic
Numeric Type	None
Numeric Value	not a number
Simple Case Folding	Invisible Separator
Script Extension
Vertical Orientation	R