Regular Expression

ALPHANUM 
A..Z, a..z, 0..9match themself
DOT 
.match any char
REPEATmust appear after some element to be repeated
?0 or 1 char ( equal to {0, 1} )
+1 or more chars ( equal to {1, } )
*0 or more chars ( equal to {0, } )
{n,}n or more chars

{,m}

 0 or more chars, up to m
{n,m}n or more chars, up to m
{n}exactly n chars
ASSERTIONS 
^Matches the starting position within the string.
$Matches the ending position of the string or the position just before a end of line
SUB-EXPRESSIONS 

(exp)

exp is subexpression
SEQUENCES 

[seq]

seq is matching sequence

[^seq]

seq is non-mathcing sequence
[ [.SYM.] ]collating SYM

 

Examples

TextRegExResult
gfksafdh W0123456 sdsfsdfsaf

W[0-9]+

W0123456

gfksafdh W0123456 sdsfsdfsaf

W[012345]+

W012345
gfksafdh W0123456 sdsfsdfsaf.[0,1,2,3,4,5,6]+W0123456
gfksafdh W0123456 sdsfsdfsaf[A-Z,0-9]*W0123456
MeaJNN: 71C61 ZooTemt[0-9][A-z]*71C61
Comentar #1 / 20.02.2021 - 16:00 / from: John Doe[0-9,\:]{5}16:00
Email from AJ to service@stepover.de was send yesterday[A-z,0-9]+@[A-z, 0-9]+\.[A-z]+service@stepover.de
1 2 21.2.2021 33 44.A[0-9]{1,2}\.[0-9]{1,2}\.[0-9]{2,4}.21.2.2021

2021-01-12 13:52:56 W090001,  01.01...V9...

10x10_FHA100_DT 3,0_Bol 0,5 / MU Per Fraction  52.5 Beam I-000 re Beam I-000 re

[0-9]+\.[0-9]

(Leerzeichen am Ende!)

52.5
urn:cid:199606121851.1@bar.example.com@[^\.]+\.@bar.