Regular Expressions 101

^start of line

Positive Lookahead(?=.*\{RqID})

.*any character (except for line terminators), repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

RqID}the literal text RqID} (case sensitive)

Positive Lookahead(?=.*\{Rg})

.*any character (except for line terminators), repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Rg}the literal text Rg} (case sensitive)

Positive Lookahead(?=.*\{Desc})

.*any character (except for line terminators), repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Desc}the literal text Desc} (case sensitive)

Positive Lookahead(?=.*\{RT})

.*any character (except for line terminators), repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

RT}the literal text RT} (case sensitive)

Negative Lookahead(?!.*(\{(Desc|Rg|RqID|RT)}).*\1)

.*any character (except for line terminators), repeated any number of times

Group 1(\{(Desc|Rg|RqID|RT)})

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

Group 2(Desc|Rg|RqID|RT)

1st AlternativeDesc

Descthe literal text Desc (case sensitive)

2nd AlternativeRg

Rgthe literal text Rg (case sensitive)

3rd AlternativeRqID

RqIDthe literal text RqID (case sensitive)

4th AlternativeRT

RTthe literal text RT (case sensitive)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

.*any character (except for line terminators), repeated any number of times

\1the text saved by group 1

.*any character (except for line terminators), repeated any number of times

$end of line

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^(?=.*\{RqID})(?=.*\{Rg})(?=.*\{Desc})(?=.*\{RT})(?!.*(\{(Desc|Rg|RqID|RT)}).*\1).*$

New

{RqID}{Rg}{Desc}{RT}
{Desc}-{RqID}-{RT}-{Rg}
#{RqID}: {Desc} [{Rg}-{RT}]
{Desc}-{RqId}-{RT}-{Rg}
{Desc}-{Rq}-{RT}-{Rg}
{RqID}{RT}{Rg}{Desc}{RT}
{RqID}, {Desc, {Rg}}, {RT}

Extraction

{RqID}{Rg}{Desc}{RT}
{Desc}-{RqID}-{RT}-{Rg}
#{RqID}: {Desc} [{Rg}-{RT}]
{Desc}-{RqId}-{RT}-{Rg}
{Desc}-{Rq}-{RT}-{Rg}
{RqID}{RT}{Rg}{Desc}{RT}
{RqID}, {Desc, {Rg}}, {RT}