// add general functions from BagFunction
generalFunctions.addAll((new GeneralBagFunctionCluster()).getSupportedFunctions());
// add NumericConvertFunction
generalFunctions.addAll((new NumericConvertFunctionCluster()).getSupportedFunctions());
// add StringNormalizeFunction
generalFunctions.addAll((new StringNormalizeFunctionCluster()).getSupportedFunctions());
// add general functions from SetFunction
generalFunctions.addAll((new GeneralSetFunctionCluster()).getSupportedFunctions());
// add the XACML 2.0 string functions
generalFunctions.addAll((new StringFunctionCluster()).getSupportedFunctions());