BNF for Markup Interpreter: Terminals and Nonterminals
This appendix lists terminals and nonterminals used by the markup interpreter. Backaus Naur Form (BNF) is a formal compiler-syntax notation system. A terminals is a symbol that is to be written exactly as represented (for example, a token). A nonterminals is a sequence of alternatives consisting of terminals or nonterminals separated by a metasymbol such as "|".