A 'fork' of Karel Asselberghs' Vim syntax file for SPSS 22 syntax. All I've actually done is clean up the file and host it.
This file was uploaded by a user (Karel) to vim.org in 2015 and has just a few hundred downloads, so I wouldn't be shocked if it disappears one day soon.
I've used this since 2017 but I recently decided to rebuild the git history.