diff --git a/src_main/core/pivarianttypes.h b/src_main/core/pivarianttypes.h
index 1a22682b..deced4e1 100644
--- a/src_main/core/pivarianttypes.h
+++ b/src_main/core/pivarianttypes.h
@@ -33,28 +33,92 @@ class PIPropertyStorage;
 
 namespace PIVariantTypes {
 
+    /**
+     * @brief name-value pair
+     */
 	struct PIP_EXPORT Enumerator {
 		Enumerator(int v = 0, const PIString & n = PIString()): value(v), name(n) {}
 		int value;
 		PIString name;
 	};
 
+	/**
+	 * @brief Collection of PIVariantTypes::Enumerator. It's replace classic c-style enum.
+	 * Contains elements with unique name and not uniqueue values.
+	 */
 	struct PIP_EXPORT Enum {
 		Enum(const PIString & n = PIString()): enum_name(n) {}
 		PIString toString() const {return selected;} // obsolete
+
+        /**
+         * @brief Find selected value.
+         * @return selected value, otherwrise 0
+         */
 		int selectedValue() const;
+
+		/**
+		 * @brief Get selected name
+		 * @return selected name, otherwrise empty PIString
+		 */
 		PIString selectedName() const {return selected;}
+
+		/**
+		 * @brief Select value if exists in Enum. If Enum contains several PIVariantTypes::Enumerator with same values,
+		 * first PIVariantTypes::Enumerator will selected
+		 * @param v value for selection
+		 * @return true if value exists in Enum, false otherwrise
+		 */
 		bool selectValue(int v);
+
+		/**
+		 * @brief Select name if exists in enum
+		 * @param n name for selection
+		 * @return true if name exists in Enum, false otherwrise
+		 */
 		bool selectName(const PIString & n);
+
+		/**
+		 * @brief Find PIVariantTypes::Enumerator with specific name and return it value
+		 * @param n name for search
+		 * @return value of founded PIVariantTypes::Enumerator, 0 otherwrise
+		 */
 		int value(const PIString & n) const;
+
+		/**
+		 * @brief Find first PIVariantTypes::Enumerator with specific value and return it name
+		 * @param v value for search
+		 * @return name of founded PIVariantTypes::Enumerator, empty string otherwrise
+		 */
 		PIString name(int v) const;
+
+		/**
+		 * @brief Make vector of Enum values
+		 */
 		PIVector<int> values() const;
+
+		/**
+		 * @brief Make vector of Enum names
+		 */
 		PIStringList names() const;
 		PIString enum_name;
 		PIString selected;
 		PIVector<Enumerator> enum_list;
+
+		/**
+		 * @brief Add PIVariantTypes::Enumerator to Enum
+		 */
 		Enum & operator <<(const Enumerator & v);
+
+        /**
+         * @brief Add PIVariantTypes::Enumerator element to Enum. Element contains specific name and value more per
+         * unit then last element. If the is no elements, contains zero value.
+         * @param v name for new PIVariantTypes::Enumerator element
+         */
 		Enum & operator <<(const PIString & v);
+
+		/**
+		 * @brief Add PIVariantTypes::Enumerator element for each name in vector
+		 */
 		Enum & operator <<(const PIStringList & v);
 	};