Meta Expressions - Data notation

Meta Expressions, aka Meta Expressions, is a data notation created in 1960.

#1649on PLDB

64Years Old

In computer programming, M-expressions (or meta-expressions) were an early proposed syntax for the Lisp programming language, inspired by contemporary languages such as Fortran and ALGOL.. Read more on Wikipedia...

Meta Expressions Wikipedia page
Meta Expressions first developed in Massachusetts Institute of Technology

Example from the web:

 [1;2;3]
 f[x;y]
 label[square;λ[[x];product[x;x]]]
 [lessthan[x;0] → negative[x]; T → x]