diff -r 43e10dccc16a -r b4583cb86f18 plcopen/iec_std.csv
--- a/plcopen/iec_std.csv	Wed Jan 14 19:46:01 2009 +0100
+++ b/plcopen/iec_std.csv	Wed Jan 14 19:47:06 2009 +0100
@@ -20,16 +20,16 @@
 ;DATE_AND_TIME_TO_TIME_OF_DAY;1;(DT);TOD;Conversion to time-of-day;no;(None, "__date_and_time_to_time_of_day", None);defined
 ;DATE_AND_TIME_TO_DATE;1;(DT);DATE;Conversion to date;no;(None, "__date_and_time_to_date", None);defined
 Numerical;ABS;1;(ANY_NUM);ANY_NUM;Absolute number;no;(None, "__abs_", "IN_type");IN_type_symbol
-;SQRT;1;(ANY_REAL);ANY_REAL;Square root (base 2);no;(None, "sqrt", None);IN_type_symbol
-;LN;1;(ANY_REAL);ANY_REAL;Natural logarithm;no;(None, "ln", None);IN_type_symbol
-;LOG;1;(ANY_REAL);ANY_REAL;Logarithm to base 10;no;(None, "log", None);IN_type_symbol
-;EXP;1;(ANY_REAL);ANY_REAL;Exponentiation;no;(None, "exp", None);IN_type_symbol
-;SIN;1;(ANY_REAL);ANY_REAL;Sine;no;(None, "sin", None);IN_type_symbol
-;COS;1;(ANY_REAL);ANY_REAL;Cosine;no;(None, "cos", None);IN_type_symbol
-;TAN;1;(ANY_REAL);ANY_REAL;Tangent;no;(None, "tan", None);IN_type_symbol
-;ASIN;1;(ANY_REAL);ANY_REAL;Arc sine;no;(None, "asin", None);IN_type_symbol
-;ACOS;1;(ANY_REAL);ANY_REAL;Arc cosine;no;(None, "acos", None);IN_type_symbol
-;ATAN;1;(ANY_REAL);ANY_REAL;Arc tangent;no;(None, "atan", None);IN_type_symbol
+;SQRT;1;(ANY_REAL);ANY_REAL;Square root (base 2);no;(None, "__sqrt_", "IN_type");IN_type_symbol
+;LN;1;(ANY_REAL);ANY_REAL;Natural logarithm;no;(None, "__ln_", "IN_type");IN_type_symbol
+;LOG;1;(ANY_REAL);ANY_REAL;Logarithm to base 10;no;(None, "__log_", "IN_type");IN_type_symbol
+;EXP;1;(ANY_REAL);ANY_REAL;Exponentiation;no;(None, "__exp_", "IN_type");IN_type_symbol
+;SIN;1;(ANY_REAL);ANY_REAL;Sine;no;(None, "__sin_", "IN_type");IN_type_symbol
+;COS;1;(ANY_REAL);ANY_REAL;Cosine;no;(None, "__cos_", "IN_type");IN_type_symbol
+;TAN;1;(ANY_REAL);ANY_REAL;Tangent;no;(None, "__tan_", "IN_type");IN_type_symbol
+;ASIN;1;(ANY_REAL);ANY_REAL;Arc sine;no;(None, "__asin_", "IN_type");IN_type_symbol
+;ACOS;1;(ANY_REAL);ANY_REAL;Arc cosine;no;(None, "__acos_", "IN_type");IN_type_symbol
+;ATAN;1;(ANY_REAL);ANY_REAL;Arc tangent;no;(None, "__atan_", "IN_type");IN_type_symbol
 Arithmetic;ADD;1;(ANY_NUM, ANY_NUM);ANY_NUM;Addition;yes;(None, "__add_", "return_type");copy_input
 ;ADD;1;(TIME, TIME);TIME;Time addition;no;(None, "__time_add", None);defined
 ;ADD;1;(TOD, TIME);TOD;Time-of-day addition;no;(None, "__time_add", None);defined
@@ -46,7 +46,7 @@
 ;DIV;1;(ANY_NUM, ANY_NUM);ANY_NUM;Division;no;(None, "__div_", "return_type");copy_input
 ;DIV;1;(TIME, ANY_NUM);TIME;Time division;no;(None, "__time_div", None);defined
 ;MOD;1;(ANY_NUM, ANY_NUM);ANY_NUM;Remainder (modulo);no;(None, "__mod_", "return_type");copy_input
-;EXPT;1;(ANY_NUM, ANY_NUM);ANY_NUM;Exponent;no;(None, "pow", None);copy_input
+;EXPT;1;(ANY_REAL, ANY_NUM);ANY_REAL;Exponent;no;(None, "__expt_", "IN1_type");copy_input
 ;MOVE;1;(ANY);ANY;Assignment;no;(None, "__move_", "return_type");copy_input
 Bit-shift;SHL;1;(ANY_BIT, N);ANY_BIT;Shift left;no;(None, "__shl_", "IN_type");IN_type_symbol
 ;SHR;1;(ANY_BIT, N);ANY_BIT;Shift right;no;(None, "__shr_", "IN_type");IN_type_symbol