Gramatica

Gramática da linguagem em EBNF

• Start = {Media | Port | Context | Region | Link};

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• Letras = "a" | "b" | "c" | ... | "z" | "A" | "B" | "C" | ... | "Z";
• Numeros = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
• Simbolos = "@" | "_" | "/" | "." | "%" | "," | "-";
• AlphaNumeric = {Letras | Numeros};
• AlphaNumericSymbols = {Letras | Numeros | Simbolos};

---

• String = '"' AlphaNumeric '"';
• Property = AlphaNumeric "=" String;
• Refer = "refer" "=" AlphaNumeric;

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• Port = "port" AlphaNumeric AlphaNumeric;

---

• Region = "region" AlphaNumeric {Region | Property} "end";

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• Media = "media" AlphaNumeric {Area | Refer | Property} "end";

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• Area = "area" AlphaNumeric {Property} "end";

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• Context = "context" AlphaNumeric {Port | Property | Media | Context | Link} "end";

---

• Link = {Condition*} {Action} "end";

• Condition = AlphaNumeric AlphaNumeric ("and" | "do");

• Action = ActionMedia ActionParam "end";

• ActionMedia = AlphaNumeric AlphaNumeric;

• ActionParam = AlphaNumeric "=" String;