Added/Corrected Documentation

MathPad/MPFractionFunction.h

@@ -8,11 +8,35 @@
 
 #import "MPFunction.h"
 
+
+
 @class MPFractionFunction, MPExpression;
 
+
+/*!
+    @class      MPFractionFunction
+    @brief      This class represents a fraction.
+ 
+    @discussion When a fraction is evaluated the nominator is divided by the
+                denominator.
+ */
 @interface MPFractionFunction : MPFunction
 
+/*!
+    @property   nominatorExpression
+    @brief      The receiver's nominator.
+ 
+    @discussion The nominator must not define a variable.
+ */
 @property (nonatomic, strong) MPExpression *nominatorExpression;
+
+
+/*!
+    @property   denominatorExpression
+    @brief      The receiver's denominator.
+ 
+    @discussion The denominator must not define a variable.
+ */
 @property (nonatomic, strong) MPExpression *denominatorExpression;
 
 @end