Regular Expressions 101

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Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
^[0-9\- ]{10,17}X?$
/
gm
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Description

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

Submitted by Stephan Druskat, Jurriaan H. Spaaks - 4 years ago