Appendix E: Cisco UGCA Enumeration Types: enum.xml

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 "|".

Terminals

 
<IDENTIFIER> ::= <LETTER> (<LETTER>|<DIGIT>|<SYMBOL>)*

 
    <LETTER> ::= ["a"-"z", "A"-"Z"]

 
    <SYMBOL> ::= ["_", "."]

 
  <STR_CHAR> ::= (~["\"","\\","\n","\r"])

 
               | ("\\"

 
                   ( ["n","t","b","r","f","\\","'","\""]

 
                   | ["0"-"7"] ( ["0"-"7"] )?

 
                   | ["0"-"3"] ["0"-"7"] ["0"-"7"]

)

 
     <DIGIT> ::= ["0"-"9"]

 
<BOOL_VALUE> ::= "TRUE"|"FALSE"|"true"|"false"

Nonterminals

 
            CompilationUnit ::= ( Statement )* <EOF>

 
                Expression  ::= Assignment

 
                             | ConditionalMatchExpression

 
                Assignment  ::= PrimaryExpression "=" Expression

Table of Contents

BNF for Markup Interpreter: Terminals and Nonterminals

Terminals

Nonterminals

BNF for Markup Interpreter:
Terminals and Nonterminals