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2.2.6.2.3.2 Function Tokens

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Function tokens represent variable or fixed argument functions. The TokenValue MUST be the name of the function as specified for each function by the ABNF func-name column in the Function Token Table in the Function Token Table section. The TokenType specifies the type of the token and MUST be either PtgFunc or PtgFuncVar. For variable argument functions, the number of arguments is specified by theABNF.