Added Documentation

MathPad/MPSummand.h

@@ -8,11 +8,35 @@
 
 #import "MPExpressionTreeElement.h"
 
+
+
 @class MPSummand, MPOperatorChain, MPProduct;
 
+
+/*!
+    @class      MPSummand
+    @brief      A summand is a part of an expression that consists of a list of
+                addition and subtraction operators and a product.
+ */
 @interface MPSummand : NSObject <MPExpressionTreeElement>
 
+
+/*!
+    @property   operatorChain
+    @brief      The summand's preceeding operators.
+ 
+    @discussion The operator chain is interpreted as a factor for the @c product
+                property of the summand during evaluation.
+ */
 @property (readonly, nonatomic, strong) MPOperatorChain *operatorChain;
+
+
+/*!
+    @property   product
+    @brief      The summand's product.
+ 
+    @discussion The product is the @em value of a summand.
+ */
 @property (readonly, nonatomic, strong) MPProduct *product;
 
 @end