Added/Corrected Documentation

MathPad/MPPowerFunction.h

@@ -8,16 +8,24 @@
 
 #import "MPFunction.h"
 
+
+
 @class MPPowerFunction, MPExpression;
 
+
+/*!
+    @class      MPPowerFunction
+    @brief      This class represents a power.
+ */
 @interface MPPowerFunction : MPFunction
 
 /*!
- @property   baseValue
- @brief      The receiver's base value.
+    @property   exponentExpression
+    @brief      The receiver's exponent.
  
- @discussion The base value is the thing a suffix function applies to (e.g.
- a power's base).
+    @discussion The base of the power can only be set during evaluation because
+                it is not actually part of the function element.
+                The exponent must not define a variable.
  */
 @property (nonatomic, strong) MPExpression *exponentExpression;