diff --git a/src/Label.vala b/src/Label.vala
index 1fd57df..f95cae6 100644
--- a/src/Label.vala
+++ b/src/Label.vala
@@ -1,12 +1,36 @@
 namespace CairoChart {
 
+	/**
+	 * Value of the point.
+	 */
 	public class Label {
 
+		/**
+		 * ``Label`` Style.
+		 */
 		public struct Style {
+
+			/**
+			 * Font style.
+			 */
 			Font.Style font_style;
+
+			/**
+			 * Frame line style.
+			 */
 			Line.Style frame_line_style;
+
+			/**
+			 * Background color.
+			 */
 			Color bg_color;
+
+			/**
+			 * Frame/border color.
+			 */
 			Color frame_color;
 		}
+
+		private Label () { }
 	}
 }