> Vectorscan is typically used in a DPI library stack, just like Hyperscan.

> Hyperscan is typically used in a DPI library stack. [https://www.hyperscan.io/about/]

Can anybody tell me what is actually DPI?

I only found the term "Data Processing Interface" and this paper http://cidrdb.org/cidr2019/papers/p11-alonso-cidr19.pdf

But this looks very theoretic, compared to MPI (message passing interface), which actually has a reference implementation and thelike.