Question

Does anyone know where to find a Backus-Naur Form (BNF) or Extended BNF for WikiWord? I expect to find a precise grammar of WikiWord

Regards,

Spenser

Environment

Answer

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There is no BNF documentation, though are invited to contribute one. WikiWords are described at WikiWord. WikiWords are linked automatically of preceeded by whitespace or parenthesis.

-- PeterThoeny - 16 Jul 2007

Thanks Peter, here is the EBNF grammar based on what I reverse-engineered the behavior of creating new topics:

      wikiWord := firstWord restWord*
      firstWord := upperLetter (upperLetter | lowerLetter)*
      restWord := upperLetter (upperLetter | lowerLetter | number)* 
      lowerLetter := a | b | c | ...| z
      upperLetter := A | B | C |...| Z
      number := 0 | 1 | 2 |...| 9

-- SpenserKao - 17 Jul 2007

That grammar define as WikiWords things like U and UU, which is not right.

I think is more like this:

      wikiWord := firstWord restWord+
      firstWord := upperLetter+ (lowerLetter | number)+
      restWord := upperLetter (upperLetter | lowerLetter | number)* 
      lowerLetter := a | b | c | ...| z
      upperLetter := A | B | C |...| Z
      number := 0 | 1 | 2 |...| 9

Let´s see (U stands for Upper Case, l for lower case, 1 for number):

UlU? UUlU? UllU? U1U? U11U? UUllU? UiU1? UiUl? UiUU?

-- RafaelAlvarez - 17 Jul 2007

After consulting Extended Backus–Naur form I think this one is the correct syntax.

    wikiWord        = upperLetters , lowerNumLetters , upperLetters , { alphaNum } ;
    upperLetters    = upperCase , { upperCase } ;
    lowerNumLetters = lowerNum , { lowerNum } ;
    alphaNum        = upperCase | lowerCase | digit ;
    lowerNum        = lowerCase | digit ;
    lowerCase       = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i"
                    | "j" | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r"
                    | "s" | "t" | "u" | "v" | "w" | "x" | "y" | "z" ;
    upperCase       = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I"
                    | "J" | "K" | "L" | "M" | "N" | "O" | "P" | "Q" | "R"
                    | "S" | "T" | "U" | "V" | "W" | "X" | "Y" | "Z" ;
    digit           = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;

WikiWord is updated.

-- PeterThoeny - 18 Jul 2007

That's a more formal definition. Thanks

-- RafaelAlvarez - 18 Jul 2007

With 4.2, I'm encountering words that did not use to be wiki words and that do not fit the BNR in WikiWord. Such as

I1CONSUM?

I1CONSUM2?

-- JerreCope - 15 May 2008