diff --git a/CMakeLists.txt b/CMakeLists.txt
index e47deaa..eedf605 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -86,9 +86,7 @@ if(MSVC)
 else()
     add_compile_options(-Wall -Wextra -Werror -pedantic $<$<CONFIG:Release>:-O3>)
 endif()
-if($<CONFIG:Release>)
-    message(STATUS "Enable Release mode")
-endif()
+
 enable_testing()
 # include(CTest)
 set(CMAKE_MODULE_PATH ${Catch2_SOURCE_DIR}/contrib ${CMAKE_MODULE_PATH})
diff --git a/src/include/cafea/base/base.hpp b/src/include/cafea/base/base.hpp
index 4b70619..75edf14 100644
--- a/src/include/cafea/base/base.hpp
+++ b/src/include/cafea/base/base.hpp
@@ -92,6 +92,26 @@ class ObjectBase {
 			assert(0 < n && n <= 10);
 			for (int i = 0; i < n; i++) group_[i] = y[i];
 		}
+		//! Set object's tags.
+		template <class T>
+		void set_tags(init_list_<T> vals) {
+			assert(0 < n && n <= 10);
+			std::transform(vals.begin(), vals.end(), tags_.begin(),
+				[] (T a)->std::string { return fmt::format("{}", a);});
+		}
+		//! Set object's tag by index.
+		template <class T>
+		void set_tag_by_index(T val, int indx=0) {
+			assert(0 <= indx && indx <=9);
+			tags_[indx] = fmt::format("{}", val);
+		}
+		//! Get object's tags.
+		std::array<std::string, 10> get_tags() const { return tags_;}
+		//! Get object's tag by index.
+		std::string get_tag_by_index(int indx=0) {
+			assert(0 <= indx && indx <= 9);
+			return tags_[indx];
+		}
 		//! Get object's name.
 		std::string get_name() const { return name_;}
 		//! Get object's id.
@@ -106,6 +126,7 @@ class ObjectBase {
 	protected:
 		int id_{-1};//!< Object's id.
 		std::array<int, 10> group_;//!< Object's group array.
+		std::array<std::string, 10> tags_;//!< Object's tags array.
 		std::string name_{"Empty"};//!< Object's name.
 };
 }  // namespace cafea
diff --git a/test/basic/a01.cc b/test/basic/a01.cc
index f6191e0..43ba653 100644
--- a/test/basic/a01.cc
+++ b/test/basic/a01.cc
@@ -3,6 +3,7 @@
 
 #include "cafea/base/base.hpp"
 
+using namespace std::string_literals;
 using cafea::ObjectBase;
 
 TEST_CASE("init", "[ObjectBase]") {
@@ -53,3 +54,19 @@ TEST_CASE("group", "[ObjectBase]") {
         for (int i = 0; i < 9; i++) REQUIRE(gp[i] == a[i]);
     }
 }
+
+TEST_CASE("tags", "[ObjectBase]") {
+    ObjectBase obj;
+    obj.set_tags({2, 4, 6, 8, 10});
+    auto tags = obj.get_tags();
+    int i{0};
+    for(auto x: {2, 4, 6, 8, 10}) REQUIRE(std::to_string(x) == tags[i++]);
+    obj.set_tag_by_index(10, 1);
+    REQUIRE(std::to_string(10) == obj.get_tag_by_index(1));
+    obj.set_tags({"apple", "pear", "banana", "peach", "grape"});
+    auto newTags = obj.get_tags();
+    i = 0;
+    for(auto x: {"apple"s, "pear"s, "banana"s, "peach"s, "grape"s}) REQUIRE(x == newTags[i++]);
+    obj.set_tag_by_index("Pineapple", 3);
+    REQUIRE("Pineapple"s == obj.get_tag_by_index(3));
+}