META II appears to have been a DSL that used a more straightforward equivalent of BNF and transpiled/metacompiled it to a RPN-parsing VM. It was built around 19

META II appears to have been a DSL that used a more straightforward equivalent of BNF and transpiled/metacompiled it to a RPN-parsing VM. It was built around 1963. https://en.wikipedia.org/wiki/META_II https://en.wikipedia.org/wiki/META_II