regex101: PCRE (Legacy) Match Workspace

^start of line

Group author(?<author>[^.(]+)

Negated Character Class[^.(]+

+matches at least one character outside the set below:

.the literal . (46₁₀ / 56₈ / 2E₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

Non-Capturing Group(?:$(?<yearf1>\d{4})$|\.)

1st Alternative$(?<yearf1>\d{4})$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group yearf1(?<yearf1>\d{4})

\d{4}a digit, repeated exactly 4 times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\s*any whitespace character, repeated any number of times

Group title(?<title>[^?!.]*.)

Negated Character Class[^?!.]*

*matches any number of characters outside the set below:

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

.any character (except for line terminators)

\s*any whitespace character, repeated any number of times

Group journal(?<journal>[^0-9,]+)

Negated Character Class[^0-9,]+

+matches at least one character outside the set below:

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

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group yearf2(?<yearf2>\d{4})?

?repeats the group contents below at most once:

\d{4}a digit, repeated exactly 4 times

Character Class[,; ]*

*matches any number of characters from the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group issue(?<issue>[^,: ]*)

Negated Character Class[^,: ]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[,;: ]*

*matches any number of characters from the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Group pages(?<pages>\d+(?:[–-]\d+)?)

\d+a digit, repeated at least once

Non-Capturing Group(?:[–-]\d+)?

?repeats the group contents below at most once:

Character Class[–-]

–the literal – (8211₁₀ / 20023₈ / 2013₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a digit, repeated at least once

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

Search reference

Regular Expression

^(?<author>[^.(]+)(?:\((?<yearf1>\d{4})\)|\.)\s*(?<title>[^?!.]*.)\s*(?<journal>[^0-9,]+)(?<yearf2>\d{4})?[,; ]*(?<issue>[^,: ]*)[,;: ]*(?<pages>\d+(?:[–-]\d+)?)

Unit Tests

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