regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

Group 1(0|[1-9][\d]*)

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative[1-9][\d]*

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

Character Class[\d]*

*matches any number of characters from the set below:

\da digit

\h+any horizontal whitespace character, repeated at least once

Non-Capturing Group(?:@?((?<=@)[^@]+(?=@)|(?!@))(?:@\h+)?)

@?optionally matches the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 2((?<=@)[^@]+(?=@)|(?!@))

1st Alternative(?<=@)[^@]+(?=@)

Positive Lookbehind(?<=@)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Negated Character Class[^@]+

+matches at least one character outside the set below:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Positive Lookahead(?=@)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

2nd Alternative(?!@)

Negative Lookahead(?!@)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Non-Capturing Group(?:@\h+)?

?repeats the group contents below at most once:

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\h+any horizontal whitespace character, repeated at least once

Group Special(?<Special>FAM[SC]|CHIL)?

?repeats the group contents below at most once:

1st AlternativeFAM[SC]

FAMthe literal text FAM (case sensitive)

Character Class[SC]

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

Cthe literal C (67₁₀ / 103₈ / 43₁₆) (case sensitive)

2nd AlternativeCHIL

CHILthe literal text CHIL (case sensitive)

Condition(?(Special)|(?<NoSpecial>\w+))

Uses the first branch if group Special matched

If the condition is true, match this branch: — matches an empty string

Otherwise, match this branch:(?<NoSpecial>\w+)

Group NoSpecial(?<NoSpecial>\w+)

\w+any word character, repeated at least once

Condition(?(Special)\h+@([^\v]*|)@|\h*([^\v]*|))

Uses the first branch if group Special matched

If the condition is true, match this branch:\h+@([^\v]*|)@

\h+any horizontal whitespace character, repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 5([^\v]*|)

1st Alternative[^\v]*

Negated Character Class[^\v]*

2nd Alternative — matches an empty string

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Otherwise, match this branch:\h*([^\v]*|)

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

Quick Reference

25 tokens

Regular Expression

(0|[1-9][\d]*)\h+(?:@?((?<=@)[^@]+(?=@)|(?!@))(?:@\h+)?)(?<Special>FAM[SC]|CHIL)?(?(Special)|(?<NoSpecial>\w+))(?(Special)\h+@([^\v]*|)@|\h*([^\v]*|))

0 @Reference@ Objekt
1 NAME Max /Mustermann/
2 DATE 22 APR 2016
1 FAMC @I123@
1 FAMS @I124@
1 CHIL @I125@

Substitution

0 @Reference@ Objekt
1 NAME Max /Mustermann/
2 DATE 22 APR 2016
1 FAMC @I123@
1 FAMS @I124@
1 CHIL @I125@