Btw: Sanskrit is originally defined with similar-to-Backus-Naus-form rules. From "Backus–Naur form" wikipedia: The idea of describing the structure of languag

Btw: Sanskrit is originally defined with similar-to-Backus-Naus-form rules. From "Backus–Naur form" wikipedia: The idea of describing the structure of language using rewriting rules can be traced back to at least the work of Pāṇini (ancient Indian Sanskrit grammarian and a revered scholar in Hinduism who lived sometime between the 7th and 4th century BCE). His notation to describe Sanskrit word structure notation is equivalent in power to that of Backus and has many similar properties.