regex101: Logix Designer tag operand

Explanation

Pro

^start of line

Group tag(?<tag>(?:[a-zA-Z]\w*|_\w+))

Non-Capturing Group(?:[a-zA-Z]\w*|_\w+)

1st Alternative[a-zA-Z]\w*

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\w*any word character, repeated any number of times

2nd Alternative_\w+

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\w+any word character, repeated at least once

Group memspec(?<memspec>(?:(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?)))?

?repeats the group contents below at most once:

Non-Capturing Group(?:(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?))

Non-Capturing Group(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)

Non-Capturing Group(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*

*repeats the group contents below any number of times:

1st Alternative\s*\.(?:[a-zA-Z]\w*|_\w+)

\s*any whitespace character, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:[a-zA-Z]\w*|_\w+)

1st Alternative[a-zA-Z]\w*

Character Class[a-zA-Z]

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\w*any word character, repeated any number of times

2nd Alternative_\w+

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\w+any word character, repeated at least once

2nd Alternative(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\])

Non-Capturing Group(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\])

\s*any whitespace character, repeated any number of times

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

Non-Capturing Group(?:[^,\]]+)

Negated Character Class[^,\]]+

+matches at least one character outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Non-Capturing Group(?:,(?:[^,\]]+))*

*repeats the group contents below any number of times:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:[^,\]]+)

Negated Character Class[^,\]]+

+matches at least one character outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Non-Capturing Group(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?)

Non-Capturing Group(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?

?repeats the group contents below at most once:

1st Alternative\s*\.\d+

\s*any whitespace character, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

2nd Alternative\.\s*(?:\s*\[(?:[^,\]]+)\])

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:\s*\[(?:[^,\]]+)\])

Group metadataspec(?<metadataspec>(?:\s*\.\@(?<metadataid>(?:[a-zA-Z]\w*|_\w+))(?<metadatamemspec>(?:(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?)))?))?

$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

Quick Reference

25 tokens

Regular Expression

^(?<tag>(?:[a-zA-Z]\w*|_\w+))(?<memspec>(?:(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?)))?(?<metadataspec>(?:\s*\.\@(?<metadataid>(?:[a-zA-Z]\w*|_\w+))(?<metadatamemspec>(?:(?:(?:\s*\.(?:[a-zA-Z]\w*|_\w+)|(?:\s*\[(?:[^,\]]+)(?:,(?:[^,\]]+))*\]))*)(?:(?:\s*\.\d+|\.\s*(?:\s*\[(?:[^,\]]+)\]))?)))?))?$

Unit Tests

There are no unit tests.