Regular Expressions 101

\ba Unicode word boundary

Group 1([A-Z]+(?:[^\S\r\n]+[A-Z]+)*)

Character Class[A-Z]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Non-Capturing Group(?:[^\S\r\n]+[A-Z]+)*

*repeats the group contents below any number of times:

Negated Character Class[^\S\r\n]+

+matches at least one character outside the set below:

\Sany character that is not Unicode whitespace

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Character Class[A-Z]+

+matches at least one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Negated Character Class[^\S\r\n]+

+matches at least one character outside the set below:

\Sany character that is not Unicode whitespace

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 2([A-Z0-9].*?(?= [A-Z]|$))

Character Class[A-Z0-9]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.*?any Unicode character (except for line terminators), repeated any number of times

Positive Lookahead(?= [A-Z]|$)

1st Alternative [A-Z]

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

2nd Alternative$

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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25 tokens

Regular Expression

\b([A-Z]+(?:[^\S\r\n]+[A-Z]+)*):[^\S\r\n]+([A-Z0-9].*?(?= [A-Z]|$))

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