In later years, I returned to XSLT to try parsing a structured text format for tool definitions in the Galaxy bioinformatics platform.

Turns out you can do a lot with the RegEx-support in XSLT 2.0!

https://saml.rilspace.com/exercise-in-xslt-regex-partial-gal...

The result? A Java-based tools for creating CLI commands via a wizard:

https://www.youtube.com/watch?v=WMjXsBVqp7s