Regular Expressions 101

Community Patterns

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Community Library Entry

2

Regular Expression
ECMAScript (JavaScript)

/
^(?:en-GB-oed|i-ami|i-bnn|i-default|i-enochian|i-hak|i-klingon|i-lux|i-mingo|i-navajo|i-pwn|i-tao|i-tay|i-tsu|sgn-BE-FR|sgn-BE-NL|sgn-CH-DE|art-lojban|cel-gaulish|no-bok|no-nyn|zh-guoyu|zh-hakka|zh-min|zh-min-nan|zh-xiang|(?<langtag>(?<language>[A-Za-z]{2,3}(?<extlang>-[A-Za-z]{3}(-[A-Za-z]{3}){0,2})?|[A-Za-z]{4,8})(?:-(?<script>[A-Za-z]{4}))?(?:-(?<region>[A-Za-z]{2}|[0-9]{3}))?(?<variants>(?:-(?:[0-9A-Za-z]{5,8}|[0-9][0-9A-Za-z]{3}))*)(?<extensions>(?:-(?:[0-9A-WY-Za-wy-z](?:-[0-9A-Za-z]{2,8})+))*)(?:-(?<privateuse>x(?:-[0-9A-Za-z]{1,8})+))?)|(?<privateuse>x(?:-[0-9A-Za-z]{1,8})+))$
/
mgi

Description

BCP 47, RFC 5646, Tags for Identifying Languages

Phillips, A., Ed., and M. Davis, Ed., "Tags for Identifying Languages", BCP 47, RFC 5646, DOI 10.17487/RFC5646, September 2009, https://www.rfc-editor.org/info/rfc5646.

Submitted by anonymous - 12 days ago