Regular Expressions 101

1st Alternative(?<prefix>/PartOfPath/)EN(?<suffix>/EndofPath/Caution.txt)

Group prefix(?<prefix>/PartOfPath/)

/PartOfPath/the literal text /PartOfPath/ (case insensitive)

ENthe literal text EN (case insensitive)

Group suffix(?<suffix>/EndofPath/Caution.txt)

/EndofPath/Cautionthe literal text /EndofPath/Caution (case insensitive)

.any Unicode character (except for line terminators)

txtthe literal text txt (case insensitive)

2nd Alternative(?<prefix>/OtherPartOfPath/)EN(?<suffix>/EndofPath/Note.txt)

Group prefix(?<prefix>/OtherPartOfPath/)

/OtherPartOfPath/the literal text /OtherPartOfPath/ (case insensitive)

ENthe literal text EN (case insensitive)

Group suffix(?<suffix>/EndofPath/Note.txt)

/EndofPath/Notethe literal text /EndofPath/Note (case insensitive)

.any Unicode character (except for line terminators)

txtthe literal text txt (case insensitive)

3rd Alternative(?<prefix>/ThirdPartOfPath/)EN(?<suffix>/OtherEndofPath/Warning.txt)

Group prefix(?<prefix>/ThirdPartOfPath/)

/ThirdPartOfPath/the literal text /ThirdPartOfPath/ (case insensitive)

ENthe literal text EN (case insensitive)

Group suffix(?<suffix>/OtherEndofPath/Warning.txt)

/OtherEndofPath/Warningthe literal text /OtherEndofPath/Warning (case insensitive)

.any Unicode character (except for line terminators)

txtthe literal text txt (case insensitive)

Global pattern flags

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

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Search reference

Regular Expression

(?<prefix>/PartOfPath/)EN(?<suffix>/EndofPath/Caution.txt)|(?<prefix>/OtherPartOfPath/)EN(?<suffix>/EndofPath/Note.txt)|(?<prefix>/ThirdPartOfPath/)EN(?<suffix>/OtherEndofPath/Warning.txt)

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