Source: Arimo

U+2557 Box Drawings Double Down and Left

U+2557 was added to Unicode in version 1.1 (1993). It belongs to the block U+2500 to U+257F Box Drawing in the U+0000 to U+FFFF Basic Multilingual Plane.

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

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+2557 behaves as Ambiguous (Alphabetic or Ideographic) 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:

Box-drawing characters, also known as line-drawing characters, are a form of semigraphics widely used in text user interfaces to draw various geometric frames and boxes. Box-drawing characters typically only work well with monospaced fonts. In graphical user interfaces, these characters are much less useful as it is more simple and appropriate to draw lines and rectangles directly with graphical APIs. However, they are still useful for command-line interfaces and plaintext comments within source code.
Used along with box-drawing characters are block elements, shade characters, and terminal graphic characters, these can be used for filling regions of the screen and portraying drop shadows.

Representations

System	Representation
Nº	9559
UTF-8	E2 95 97
UTF-16	25 57
UTF-32	00 00 25 57
URL-Quoted	%E2%95%97
HTML-Escape	╗
Wrong windows-1252 Mojibake	â
HTML-Escape	&boxDL;
Encoding: IBM866 (hex bytes)	BB
Encoding: KOI8-R (hex bytes)	A8
Encoding: KOI8-U (hex bytes)	A8
Adobe Glyph List	SF250000

Elsewhere

Complete Record

Property	Value
Age	1.1 (1993)
Unicode Name	BOX DRAWINGS DOUBLE DOWN AND LEFT
Unicode 1 Name	FORMS DOUBLE DOWN AND LEFT
Block	Box Drawing
General Category	Other Symbol
Script	Common
Bidirectional Category	Other Neutral
Combining Class	Not Reordered
Decomposition Type	None
Decomposition Mapping	Box Drawings Double Down and Left
Lowercase	✘
Simple Lowercase Mapping	Box Drawings Double Down and Left
Lowercase Mapping	Box Drawings Double Down and Left
Uppercase	✘
Simple Uppercase Mapping	Box Drawings Double Down and Left
Uppercase Mapping	Box Drawings Double Down and Left
Simple Titlecase Mapping	Box Drawings Double Down and Left
Titlecase Mapping	Box Drawings Double Down and Left
Case Folding	Box Drawings Double Down and Left
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	Box Drawings Double Down and Left
Grapheme Cluster Break	Any
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 Casefold	Box Drawings Double Down and Left
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	Other
Soft Dotted	✘
Sentence Terminal	✘
Terminal Punctuation	✘
Unified Ideograph	✘
Variation Selector	✘
Word Break	Other
White Space	✘
XID Continue	✘
XID Start	✘
Expands On NFC	✘
Expands On NFD	✘
Expands On NFKC	✘
Expands On NFKD	✘
Bidi Paired Bracket	Box Drawings Double Down and Left
Bidi Paired Bracket Type	None
East Asian Width	Ambiguous
Hangul Syllable Type	Not Applicable
ISO 10646 Comment	—
Joining Group	No_Joining_Group
Joining Type	Non Joining
Line Break	Ambiguous (Alphabetic or Ideographic)
Numeric Type	None
Numeric Value	not a number
Simple Case Folding	Box Drawings Double Down and Left
Script Extension
Vertical Orientation	R