Pattern Syntax - Yes

Unicode Version 18.0

Yes is the designation for characters that Unicode officially recognizes as valid syntax elements within regular expression patterns, meaning they are permitted to appear as literals or operators in pattern definitions without needing escaping. This value applies to a specific set of punctuation marks, such as brackets, parentheses, asterisks, plus signs, question marks, and backslashes, which have well defined roles in pattern matching logic. Characters marked with "Yes" are excluded from being treated as ordinary text in such contexts, ensuring that pattern parsers can reliably interpret their intended function. This designation helps distinguish syntactically active symbols from those that are purely content characters, providing a consistent baseline for regex engines across different programming languages and tools.

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Exclamation Mark

Left Parenthesis

Right Parenthesis

Greater-than Sign

Left Square Bracket

Reverse Solidus

Right Square Bracket

Circumflex Accent

Left Curly Bracket

Right Curly Bracket

Inverted Exclamation Mark

Left-Pointing Double Angle Quotation Mark

Registered Sign

Plus-Minus Sign

Right-Pointing Double Angle Quotation Mark

Inverted Question Mark

Multiplication Sign

Non-Breaking Hyphen

Double Vertical Line

Double Low Line

Left Single Quotation Mark

Right Single Quotation Mark

Single Low-9 Quotation Mark

Single High-Reversed-9 Quotation Mark

Left Double Quotation Mark

Right Double Quotation Mark

Double Low-9 Quotation Mark

Double High-Reversed-9 Quotation Mark

Triangular Bullet

Horizontal Ellipsis

Hyphenation Point

Per Ten Thousand Sign

Reversed Double Prime

Reversed Triple Prime

Single Left-Pointing Angle Quotation Mark

Single Right-Pointing Angle Quotation Mark

Double Exclamation Mark

Caret Insertion Point

Left Square Bracket with Quill

Right Square Bracket with Quill

Double Question Mark

Question Exclamation Mark

Exclamation Question Mark

Tironian Sign Et

Reversed Pilcrow Sign

Black Leftwards Bullet

Black Rightwards Bullet

Reversed Semicolon

Two Asterisks Aligned Vertically

Commercial Minus Sign

Flower Punctuation Mark

Three Dot Punctuation

Quadruple Prime

Four Dot Punctuation

Five Dot Punctuation

Two Dot Punctuation

Vertical Four Dots

Leftwards Arrow

Rightwards Arrow

Downwards Arrow

Left Right Arrow

North West Arrow

North East Arrow

South East Arrow

South West Arrow

Leftwards Arrow with Stroke

Rightwards Arrow with Stroke

Leftwards Wave Arrow

Rightwards Wave Arrow

Leftwards Two Headed Arrow

Upwards Two Headed Arrow

Rightwards Two Headed Arrow

Downwards Two Headed Arrow

Leftwards Arrow with Tail

Rightwards Arrow with Tail

Leftwards Arrow from Bar

Upwards Arrow from Bar

Rightwards Arrow from Bar

Downwards Arrow from Bar

Up down Arrow with Base

Leftwards Arrow with Hook

Rightwards Arrow with Hook

Leftwards Arrow with Loop

Rightwards Arrow with Loop

Left Right Wave Arrow

Left Right Arrow with Stroke

Downwards Zigzag Arrow

Upwards Arrow with Tip Leftwards

Upwards Arrow with Tip Rightwards

Downwards Arrow with Tip Leftwards

Downwards Arrow with Tip Rightwards

Rightwards Arrow with Corner Downwards

Downwards Arrow with Corner Leftwards

Anticlockwise Top Semicircle Arrow

Clockwise Top Semicircle Arrow

North West Arrow to Long Bar

Leftwards Arrow to Bar over Rightwards Arrow to Bar

Anticlockwise Open Circle Arrow

Clockwise Open Circle Arrow

Leftwards Harpoon with Barb Upwards

Leftwards Harpoon with Barb Downwards

Upwards Harpoon with Barb Rightwards

Upwards Harpoon with Barb Leftwards

Rightwards Harpoon with Barb Upwards

Rightwards Harpoon with Barb Downwards

Downwards Harpoon with Barb Rightwards

Downwards Harpoon with Barb Leftwards

Rightwards Arrow over Leftwards Arrow

Upwards Arrow Leftwards of Downwards Arrow

Leftwards Arrow over Rightwards Arrow

Leftwards Paired Arrows

Upwards Paired Arrows

Rightwards Paired Arrows

Downwards Paired Arrows

Leftwards Harpoon over Rightwards Harpoon

Rightwards Harpoon over Leftwards Harpoon

Leftwards Double Arrow with Stroke

Left Right Double Arrow with Stroke

Rightwards Double Arrow with Stroke

Leftwards Double Arrow

Upwards Double Arrow

Rightwards Double Arrow

Downwards Double Arrow

Left Right Double Arrow

Up down Double Arrow

North West Double Arrow

North East Double Arrow

South East Double Arrow

South West Double Arrow

Leftwards Triple Arrow

Rightwards Triple Arrow

Leftwards Squiggle Arrow

Rightwards Squiggle Arrow

Upwards Arrow with Double Stroke

Downwards Arrow with Double Stroke

Leftwards Dashed Arrow

Upwards Dashed Arrow

Rightwards Dashed Arrow

Downwards Dashed Arrow

Leftwards Arrow to Bar

Rightwards Arrow to Bar

Leftwards White Arrow

Upwards White Arrow

Rightwards White Arrow

Downwards White Arrow

Upwards White Arrow from Bar

Upwards White Arrow on Pedestal

Upwards White Arrow on Pedestal with Horizontal Bar

Upwards White Arrow on Pedestal with Vertical Bar

Upwards White Double Arrow

Upwards White Double Arrow on Pedestal

Rightwards White Arrow from Wall

North West Arrow to Corner

South East Arrow to Corner

Up down White Arrow

Right Arrow with Small Circle

Downwards Arrow Leftwards of Upwards Arrow

Three Rightwards Arrows

Leftwards Arrow with Vertical Stroke

Rightwards Arrow with Vertical Stroke

Left Right Arrow with Vertical Stroke

Leftwards Arrow with Double Vertical Stroke

Rightwards Arrow with Double Vertical Stroke

Left Right Arrow with Double Vertical Stroke

Leftwards Open-Headed Arrow

Rightwards Open-Headed Arrow

Left Right Open-Headed Arrow

Partial Differential

There Does Not Exist

Not An Element Of

Small Element Of

Contains as Member

Does Not Contain as Member

Small Contains as Member

N-Ary Coproduct

N-Ary Summation

Minus-or-Plus Sign

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