1. 
   Metasyntax
   A metasyntax describes the allowable structure and composition of phrases and sentences of a metalanguage, which is used to describe either a natural language or a computer programming language. Some of the widely used formal metalanguages for computer languages are Backus–Naur Form (BNF), Extend...
   Found op http://en.wikipedia.org/wiki/Metasyntax
   
   
2. 
   metasyntax
   (grammar) Syntax used to describe syntax. The best known example is BNF and its variants such as EBNF. A metasyntactic variable is a variable used in metasyntax. (1999-04-06)
   Found op http://foldoc.org/metasyntax
   
   

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