Re: [xml-dev] RE: Defining a language using itself

On 1/12/2015 11:30 AM, Costello, Roger L. wrote:
> Here's another example of a language that is defined using the language itself:
>
> This document defines the Augmented BNF (ABNF) using ABNF:

FORTH is nearly defined using itself.  There is a very small set of 
primitives; everything else is built up using them.

Tom Passin