It's perhaps appropriate that a programming language database has its own syntax for entries! https://github.com/breck7/pldb/commit/bde872b5b8e1cf9fb3114c1fbf3c40e405b5388d
It looks like a simplified YAML I think.
miniblog.
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Bril is a cute intermediate language for teaching (think simplified LLVM IR): https://www.cs.cornell.edu/~asampson/blog/bril.html
The idea of providing a standard JSON format to help students write basic passes is really elegant.