diff --git a/src_main/core/pipropertystorage.h b/src_main/core/pipropertystorage.h
index 09486278..4a055346 100644
--- a/src_main/core/pipropertystorage.h
+++ b/src_main/core/pipropertystorage.h
@@ -30,7 +30,7 @@
 /**
  * @brief Key-value storage, based on PIVector with PIPropertyStorage::Property elements. Each element in vector
  * contains unique name and you can identify property by name with propertyValueByName(), propertyByName().
- * You can add property using addProperty().
+ * You can add property using addProperty(const Property&), addProperty(const PIString&, const PIVariant&, const PIString&, int).
  */
 class PIPropertyStorage {
 public:
@@ -42,14 +42,23 @@ public:
 	struct Property {
 		Property(const PIString & n = PIString(), const PIString & c = PIString(), const PIVariant & v = PIVariant(), int f = 0):
 			name(n), comment(c), value(v), flags(f) {}
+			
 		bool toBool() const {return value.toBool();}
 		int toInt() const {return value.toInt();}
 		float toFloat() const {return value.toFloat();}
 		double toDouble() const {return value.toDouble();}
 		PIString toString() const {return value.toString();}
+		
+		/*! Uniqueue id of property */
 		PIString name;
+
+		/*! Optional description of property */
 		PIString comment;
+
+		/*! Custom value of property */
 		PIVariant value;
+
+		/*! Abstract flags which may be used for user needs */
 		int flags;
 	};
 
@@ -81,7 +90,18 @@ public:
 	const PIPropertyStorage & propertyStorage() const {return *this;}
 	bool isPropertyExists(const PIString & _name) const;
 	void clearProperties() {props.clear();}
+
+	/**
+	 * @brief Add property if name isn't present in storage, otherwrise update existing property with same name.
+	 *
+	 * @param p to copy in storage
+	 */
 	void addProperty(const Property & p);
+
+	/**
+	 * @brief First of all construct Property with method params. After then add property if name isn't present
+	 * in storage, otherwrise update existing property with same name.
+	 */
 	void addProperty(const PIString & _name, const PIVariant & _def_value, const PIString & _comment = PIString(), int _flags = 0) {addProperty(Property(_name, _comment, _def_value, _flags));}
 	void removeProperty(const PIString & _name);
 	void removePropertiesByFlag(int flag);