This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the scripts Cherokee, Cyrillic, Latin, Osage.
The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+030B prohibits a line break before it. The glyph can be confused with 4 other glyphs.
The Wikipedia has the following information about this codepoint:
The double acute accent (◌̋) is a diacritic mark of the Latin and Cyrillic scripts. It is used primarily in Hungarian or Chuvash, and consequently it is sometimes referred to by typographers as hungarumlaut. The signs formed with a regular umlaut are letters in their own right in the Hungarian alphabet—for instance, they are separate letters for the purpose of collation. Letters with the double acute, however, are considered variants of their equivalents with the umlaut, being thought of as having both an umlaut and an acute accent.
Representations
System
Representation (click value to copy)
Nº
779
UTF-8
CC 8B
UTF-16
03 0B
UTF-32
00 00 03 0B
URL-Quoted
%CC%8B
HTML hex reference
̋
Wrong windows-1252 Mojibake
◌̋
Encoding: EUC_JIS_2004 (hex bytes)
AB D9
Encoding: EUC_JISX0213 (hex bytes)
AB D9
Encoding: GB18030 (hex bytes)
81 30 BD 37
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 28 51 2B 59 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 28 4F 2B 59 1B 28 42
Encoding: SHIFT_JIS_2004 (hex bytes)
86 78
Encoding: SHIFT_JISX0213 (hex bytes)
86 78
LATEX
\H
AGL: Latin-4
uni030B
AGL: Latin-5
uni030B
Adobe Glyph List
hungarumlautcmb
RFC 5137
\u'030B'
Bash and Zsh inside echo -e
\u030B
C and C++
\u030B
C#
\u030B
CSS
\00030B
Excel
=UNICHAR(779)
Go
\u030B
JavaScript
\u030B
Modern JavaScript since ES6
\u{30b}
JSON
\u030B
Java
\u030B
Lua
\u{30B}
Matlab
char(779)
Perl
"\x{30B}"
PHP
\u{30b}
PostgreSQL
U&'\030B'
PowerShell
`u{30B}
Python
\u030B
Ruby
\u{30b}
Rust
\u{30b}
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