Allow expression in Structured Output Parser

The idea is:

Allow an expression to be used in the Structured Output Parser

My use case:

I have a prompt designed to fetch and capture details adhering to a schema from a website or search tool. I would like to reuse this prompt across multiple schema types. This schema varies by sector, eg: travel, healthcare etc..

I think it would be beneficial to add this because:

It would save having to construct multiple flows with the output parser being the only change

Are you willing to work on this?

Yes as a tester. My nodes skills died with Django