[jpctan]

Hi fzliu,

Have you considered to add keyword search and other factors into the re-ranker?

Other factors are formatted texts like bold, heading, bullet points, as well as bunch of factors typically seen in web search techniques?

[mediaman]

Keyword search (or something similar in concept, like bm25) would typically be first stage, rather than second, since it can be done with an inverted index.

[jpctan]

I'm aware of that. My question was around using it in the ranking algorithm.