Regular Expressions 101

Community Patterns

CFF-definitions.reference.issn

0

Regular Expression
PCRE2 (PHP >=7.3)

/
^\d{4}-\d{3}[\dxX]$
/
gm

Description

Pattern for validating a definitions.reference.issn value in the Citation File Format (CFF)

Submitted by Stephan Druskat, Jurriaan H. Spaaks - 3 years ago