what is _meta in DEST_KEY field in transforms.conf and what it does and where it reflects and when we are writing _meta in DEST_KEY filed then we have to write $0 at start in FORMAT so what it means and why we have to do so?

[dtk]

i made whole transforms.conf and prop.conf for a data in splunk and analyse FORMAT in transform.conf with $0 and without it but nothing changes had reflected

[markusspitzli]

According the transforms.conf documentation:
_meta : A space-separated list of metadata for an event.

Honestly I dont get your question, but I advice you to visit the documentation for transforms.conf. It has a lot of examples, which can help you. If not feel free to clarify your question.

[richgalloway]

Please share your transforms.conf and props.conf settings.