*** This version of Confluence is for testing only and contains a copy of content from June 29th 2026. No changes will be preserved. ***
This website These websites provides a very useful list of symbols and syntax used in regular expressions, and contains examples and exercises.
https://librarycarpentry.org/lc-data-intro/01-regular-expressions.html
Tutorial: https://regex101.com/
Case example of using regular expressions to extract a component of a field that can't be parsed out via a json extract call (thank you to Jean Pajerek for this):
...