[AccessibleObject][AccessibleRelation]Add documents for accessibility classes.

Change-Id: Ia7ab23b53c2232274d4ebdd5b04f71c29c248843
Signed-off-by: Qian Sui <qian.sui@samsung.com>

6 files changed, 606 insertions, 6 deletions

diff --git a/ElmSharp/ElmSharp/AccessRole.cs b/ElmSharp/ElmSharp/AccessRole.cs
index 3ff8e35..b49b2a2 100644..100755
--- a/ElmSharp/ElmSharp/AccessRole.cs
+++ b/ElmSharp/ElmSharp/AccessRole.cs
@@ -17,110 +17,422 @@
 
 namespace ElmSharp.Accessible
 {
+    /// <summary>
+    /// Enumeration for AccessRole.
+    /// </summary>
     public enum AccessRole
     {
+        /// <summary>
+        /// Invalid
+        /// </summary>
         Invalid,
+        /// <summary>
+        /// AcceleratorLabel role
+        /// </summary>
         AcceleratorLabel,
+        /// <summary>
+        /// Alert role
+        /// </summary>
         Alert,
+        /// <summary>
+        /// Animation role
+        /// </summary>
         Animation,
+        /// <summary>
+        /// Arrow role
+        /// </summary>
         Arrow,
+        /// <summary>
+        /// Calendar role
+        /// </summary>
         Calendar,
+        /// <summary>
+        /// Canvas role
+        /// </summary>
         Canvas,
+        /// <summary>
+        /// CheckBox role
+        /// </summary>
         CheckBox,
+        /// <summary>
+        /// CheckMenuItem role
+        /// </summary>
         CheckMenuItem,
+        /// <summary>
+        /// ColorChooser role
+        /// </summary>
         ColorChooser,
+        /// <summary>
+        /// ColumnHeader role
+        /// </summary>
         ColumnHeader,
+        /// <summary>
+        /// ComboBox role
+        /// </summary>
         ComboBox,
+        /// <summary>
+        /// DateEditor role
+        /// </summary>
         DateEditor,
+        /// <summary>
+        /// DesktopIcon role
+        /// </summary>
         DesktopIcon,
+        /// <summary>
+        /// DesktopFrame role
+        /// </summary>
         DesktopFrame,
+        /// <summary>
+        /// Dial role
+        /// </summary>
         Dial,
+        /// <summary>
+        /// Dialog role
+        /// </summary>
         Dialog,
+        /// <summary>
+        /// DirectoryPane role
+        /// </summary>
         DirectoryPane,
+        /// <summary>
+        /// DrawingArea role
+        /// </summary>
         DrawingArea,
+        /// <summary>
+        /// FileChooser role
+        /// </summary>
         FileChooser,
+        /// <summary>
+        /// Filler role
+        /// </summary>
         Filler,
+        /// <summary>
+        /// FocusTraversable role
+        /// </summary>
         FocusTraversable,
+        /// <summary>
+        /// FontChooser role
+        /// </summary>
         FontChooser,
+        /// <summary>
+        /// Frame role
+        /// </summary>
         Frame,
+        /// <summary>
+        /// GlassPane role
+        /// </summary>
         GlassPane,
+        /// <summary>
+        /// HtmlContainer role
+        /// </summary>
         HtmlContainer,
+        /// <summary>
+        /// Icon role
+        /// </summary>
         Icon,
+        /// <summary>
+        /// Image role
+        /// </summary>
         Image,
+        /// <summary>
+        /// InternalFrame role
+        /// </summary>
         InternalFrame,
+        /// <summary>
+        /// Label role
+        /// </summary>
         Label,
+        /// <summary>
+        /// LayeredPane role
+        /// </summary>
         LayeredPane,
+        /// <summary>
+        /// List role
+        /// </summary>
         List,
+        /// <summary>
+        /// ListItem role
+        /// </summary>
         ListItem,
+        /// <summary>
+        /// Menu role
+        /// </summary>
         Menu,
+        /// <summary>
+        /// MenuBar role
+        /// </summary>
         MenuBar,
+        /// <summary>
+        /// MenuItem role
+        /// </summary>
         MenuItem,
+        /// <summary>
+        /// OptionPane role
+        /// </summary>
         OptionPane,
+        /// <summary>
+        /// PageTab role
+        /// </summary>
         PageTab,
+        /// <summary>
+        /// PageTabList role
+        /// </summary>
         PageTabList,
+        /// <summary>
+        /// Panel role
+        /// </summary>
         Panel,
+        /// <summary>
+        /// PasswordText role
+        /// </summary>
         PasswordText,
+        /// <summary>
+        /// PopupMenu role
+        /// </summary>
         PopupMenu,
+        /// <summary>
+        /// ProgressBar role
+        /// </summary>
         ProgressBar,
+        /// <summary>
+        /// PushButton role
+        /// </summary>
         PushButton,
+        /// <summary>
+        /// RadioButton role
+        /// </summary>
         RadioButton,
+        /// <summary>
+        /// RadioMenuItem role
+        /// </summary>
         RadioMenuItem,
+        /// <summary>
+        /// RootPane role
+        /// </summary>
         RootPane,
+        /// <summary>
+        /// RowHeader role
+        /// </summary>
         RowHeader,
+        /// <summary>
+        /// ScrollBar role
+        /// </summary>
         ScrollBar,
+        /// <summary>
+        /// ScrollPane role
+        /// </summary>
         ScrollPane,
+        /// <summary>
+        /// Separator role
+        /// </summary>
         Separator,
+        /// <summary>
+        /// Slider role
+        /// </summary>
         Slider,
+        /// <summary>
+        /// SpinButton role
+        /// </summary>
         SpinButton,
+        /// <summary>
+        /// SplitPane role
+        /// </summary>
         SplitPane,
+        /// <summary>
+        /// StatusBar role
+        /// </summary>
         StatusBar,
+        /// <summary>
+        /// Table role
+        /// </summary>
         Table,
+        /// <summary>
+        /// TableCell role
+        /// </summary>
         TableCell,
+        /// <summary>
+        /// TableColumnHeader role
+        /// </summary>
         TableColumnHeader,
+        /// <summary>
+        /// TableRowHeader role
+        /// </summary>
         TableRowHeader,
+        /// <summary>
+        /// TearoffMenuItem role
+        /// </summary>
         TearoffMenuItem,
+        /// <summary>
+        /// Terminal role
+        /// </summary>
         Terminal,
+        /// <summary>
+        /// Text role
+        /// </summary>
         Text,
+        /// <summary>
+        /// ToggleButton role
+        /// </summary>
         ToggleButton,
+        /// <summary>
+        /// ToolBar role
+        /// </summary>
         ToolBar,
+        /// <summary>
+        /// ToolTip role
+        /// </summary>
         ToolTip,
+        /// <summary>
+        /// Tree role
+        /// </summary>
         Tree,
+        /// <summary>
+        /// TreeTable role
+        /// </summary>
         TreeTable,
+        /// <summary>
+        /// Unknown
+        /// </summary>
         Unknown,
+        /// <summary>
+        /// Viewport role
+        /// </summary>
         Viewport,
+        /// <summary>
+        /// Window role
+        /// </summary>
         Window,
+        /// <summary>
+        /// Extended role
+        /// </summary>
         Extended,
+        /// <summary>
+        /// Header role
+        /// </summary>
         Header,
+        /// <summary>
+        /// Footer role
+        /// </summary>
         Footer,
+        /// <summary>
+        /// Paragraph
+        /// </summary>
         Paragraph,
+        /// <summary>
+        /// Ruler role
+        /// </summary>
         Ruler,
+        /// <summary>
+        /// Application role
+        /// </summary>
         Application,
+        /// <summary>
+        /// Autocomplete role
+        /// </summary>
         Autocomplete,
+        /// <summary>
+        /// Editbar role
+        /// </summary>
         Editbar,
+        /// <summary>
+        /// Embedded role
+        /// </summary>
         Embedded,
+        /// <summary>
+        /// Entry role
+        /// </summary>
         Entry,
+        /// <summary>
+        /// Chart role
+        /// </summary>
         Chart,
+        /// <summary>
+        /// Caption role
+        /// </summary>
         Caption,
+        /// <summary>
+        /// DocumentFrame role
+        /// </summary>
         DocumentFrame,
+        /// <summary>
+        /// Heading role
+        /// </summary>
         Heading,
+        /// <summary>
+        /// Page role
+        /// </summary>
         Page,
+        /// <summary>
+        /// Section role
+        /// </summary>
         Section,
+        /// <summary>
+        /// RedundantObject role
+        /// </summary>
         RedundantObject,
+        /// <summary>
+        /// Form role
+        /// </summary>
         Form,
+        /// <summary>
+        /// Link role
+        /// </summary>
         Link,
+        /// <summary>
+        /// InputMethodWindow role
+        /// </summary>
         InputMethodWindow,
+        /// <summary>
+        /// TableRow role
+        /// </summary>
         TableRow,
+        /// <summary>
+        /// TreeItem role
+        /// </summary>
         TreeItem,
+        /// <summary>
+        /// DocumentSpreadsheet role
+        /// </summary>
         DocumentSpreadsheet,
+        /// <summary>
+        /// DocumentPresentation role
+        /// </summary>
         DocumentPresentation,
+        /// <summary>
+        /// DocumentText role
+        /// </summary>
         DocumentText,
+        /// <summary>
+        /// DocumentWeb role
+        /// </summary>
         DocumentWeb,
+        /// <summary>
+        /// DocumentEmail role
+        /// </summary>
         DocumentEmail,
+        /// <summary>
+        /// Comment role
+        /// </summary>
         Comment,
+        /// <summary>
+        /// ListBox role
+        /// </summary>
         ListBox,
+        /// <summary>
+        /// Grouping role
+        /// </summary>
         Grouping,
+        /// <summary>
+        /// ImageMap role
+        /// </summary>
         ImageMap,
+        /// <summary>
+        /// Notification role
+        /// </summary>
         Notification,
+        /// <summary>
+        /// InfoBar role
+        /// </summary>
         InfoBar
     }
 }
diff --git a/ElmSharp/ElmSharp/AccessibleObject.cs b/ElmSharp/ElmSharp/AccessibleObject.cs
index 02ede3b..092abf6 100644..100755
--- a/ElmSharp/ElmSharp/AccessibleObject.cs
+++ b/ElmSharp/ElmSharp/AccessibleObject.cs
@@ -18,9 +18,18 @@ using System;
 
 namespace ElmSharp.Accessible
 {
-
+    /// <summary>
+    /// The delegate to define how to provide informations for <see cref="IAccessibleObject.Name"/> or <see cref="IAccessibleObject.Description"/>.
+    /// </summary>
+    /// <param name="obj">The sender obj.</param>
+    /// <returns>Return information for Name or Description.</returns>
     public delegate string AccessibleInfoProvider (AccessibleObject obj);
 
+    /// <summary>
+    /// It's a base abstract class for <see cref="Widget"/>.
+    /// It provides available definitions for the screen reader, such as <see cref="IAccessibleObject.Name"/>, <see cref="IAccessibleObject.Description"/>, <see cref="IAccessibleObject.ReadingInfoType"/>, etc.
+    /// There's many the relationship between two accessible objects, like <see cref="ChildOf"/>, <see cref="ParentOf"/>, <see cref="FlowsTo"/>, <see cref="FlowsFrom"/>, etc.
+    /// </summary>
     public abstract class AccessibleObject : EvasObject, IAccessibleObject
     {
 
@@ -30,6 +39,9 @@ namespace ElmSharp.Accessible
         Interop.Elementary.Elm_Atspi_Reading_Info_Cb _nameProviderInternal;
         Interop.Elementary.Elm_Atspi_Reading_Info_Cb _descriptionProviderInternal;
 
+        /// <summary>
+        /// Gets or sets the reading information types of an accessible object.
+        /// </summary>
         ReadingInfoType IAccessibleObject.ReadingInfoType
         {
             get
@@ -42,6 +54,10 @@ namespace ElmSharp.Accessible
                         (Interop.Elementary.Elm_Accessible_Reading_Info_Type)value);
             }
         }
+
+        /// <summary>
+        /// Gets or sets the role of the object in accessibility domain.
+        /// </summary>
         AccessRole IAccessibleObject.Role
         {
             get
@@ -54,6 +70,10 @@ namespace ElmSharp.Accessible
                         (Interop.Elementary.Elm_Atspi_Role)value);
             }
         }
+
+        /// <summary>
+        /// Gets or sets highlightable of given widget.
+        /// </summary>
         bool IAccessibleObject.CanHighlight
         {
             get
@@ -65,6 +85,13 @@ namespace ElmSharp.Accessible
                 Interop.Elementary.elm_atspi_accessible_can_highlight_set(Handle, value);
             }
         }
+
+        /// <summary>
+        /// Gets or sets the translation domain of "name" and "description" properties.
+        /// Translation domain should be set if application wants to support i18n for accessibily "name" and "description" properties.
+        /// When translation domain is set values of "name" and "description" properties will be translated with dgettext function using current translation domain as "domainname" parameter.
+        /// It is application developer responsibility to ensure that translation files are loaded and binded to translation domain when accessibility is enabled.
+        /// </summary>
         string IAccessibleObject.TranslationDomain
         {
             get
@@ -76,6 +103,10 @@ namespace ElmSharp.Accessible
                 Interop.Elementary.elm_atspi_accessible_translation_domain_set(Handle, value);
             }
         }
+
+        /// <summary>
+        /// Gets or sets an accessible name of the object.
+        /// </summary>
         string IAccessibleObject.Name
         {
             get
@@ -87,6 +118,10 @@ namespace ElmSharp.Accessible
                 Interop.Elementary.elm_atspi_accessible_name_set(Handle, value);
             }
         }
+
+        /// <summary>
+        /// Gets or sets contextual information about object.
+        /// </summary>
         string IAccessibleObject.Description
         {
             get
@@ -99,6 +134,9 @@ namespace ElmSharp.Accessible
             }
         }
 
+        /// <summary>
+        /// Gets or sets the delegate for <see cref="IAccessibleObject.Name"/>.
+        /// </summary>
         AccessibleInfoProvider IAccessibleObject.NameProvider
         {
             get
@@ -124,6 +162,10 @@ namespace ElmSharp.Accessible
                 }
             }
         }
+
+        /// <summary>
+        /// Gets or sets the delegate for <see cref = "IAccessibleObject.Description" />.
+        /// </summary>
         AccessibleInfoProvider IAccessibleObject.DescriptionProvider
         {
             get
@@ -150,31 +192,54 @@ namespace ElmSharp.Accessible
             }
         }
 
+        /// <summary>
+        /// Creates and initializes a new instance of the AccessibleObject class with parent EvasObject class parameter.
+        /// </summary>
+        /// <param name="parent">Parent EvasObject class </param>
         public AccessibleObject(EvasObject parent) : base(parent)
         {
         }
 
+        /// <summary>
+        /// Creates and initializes a new instance of the AccessibleObject class.
+        /// </summary>
         public AccessibleObject() : base()
         {
         }
 
+        /// <summary>
+        /// Defines the relationship between two accessible objects.
+        /// Relationships can be queried by Assistive Technology clients to provide customized feedback, improving overall user experience.
+        /// AppendRelation API is asymmetric, which means that appending, for example, relation <see cref="FlowsTo"/> from object A to B, do not append relation <see cref="FlowsFrom"/> from object B to object A.
+        /// </summary>
+        /// <param name="relation">The relationship between source object and target object of a given type.</param>
         void IAccessibleObject.AppendRelation(IAccessibleRelation relation)
         {
             if (relation.Target == null) throw new ArgumentException("Target of Accessibility relation can not be null");
             Interop.Elementary.elm_atspi_accessible_relationship_append(Handle, relation.Type, relation.Target.Handle);
         }
 
+        /// <summary>
+        /// Removes the relationship between two accessible objects.
+        /// </summary>
+        /// <param name="relation">The relationship between source object and target object of a given type.</param>
         void IAccessibleObject.RemoveRelation(IAccessibleRelation relation)
         {
             if (relation.Target == null) throw new ArgumentException("Target of Accessibility relation can not be null");
             Interop.Elementary.elm_atspi_accessible_relationship_remove(Handle, relation.Type, relation.Target.Handle);
         }
 
+        /// <summary>
+        /// Highlights accessible widget.
+        /// </summary>
         public void Highlight()
         {
             Interop.Elementary.elm_atspi_component_highlight_grab(Handle);
         }
 
+        /// <summary>
+        /// Clears highlight of accessible widget.
+        /// </summary>
         public void Unhighlight()
         {
             Interop.Elementary.elm_atspi_component_highlight_clear(Handle);
diff --git a/ElmSharp/ElmSharp/AccessibleRelation.cs b/ElmSharp/ElmSharp/AccessibleRelation.cs
index b909778..4d24e98 100644..100755
--- a/ElmSharp/ElmSharp/AccessibleRelation.cs
+++ b/ElmSharp/ElmSharp/AccessibleRelation.cs
@@ -17,6 +17,9 @@
 
 namespace ElmSharp.Accessible
 {
+    /// <summary>
+    /// IAccessibleRelation is a interface which defines the relationship between two accessible objects.
+    /// </summary>
     public interface IAccessibleRelation
     {
 
@@ -24,162 +27,342 @@ namespace ElmSharp.Accessible
         int Type { get; }
     }
 
+    /// <summary>
+    /// To define label info for accessible object.
+    /// </summary>
     public class LabelledBy : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is LabelledBy.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the LabelledBy type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_LABELLED_BY; }
         }
     }
 
+    /// <summary>
+    /// To define label info for accessible object.
+    /// </summary>
     public class LabelFor : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is LabelFor.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the LabelFor type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_LABEL_FOR; }
         }
     }
 
+    /// <summary>
+    /// To define control relationship for accessible object.
+    /// </summary>
     public class ControllerFor : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is ControllerFor.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the ControllerFor type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_CONTROLLER_FOR; }
         }
     }
 
+    /// <summary>
+    /// To define control relationship for accessible object.
+    /// </summary>
     public class ControlledBy : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is ControlledBy.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the ControlledBy type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_CONTROLLED_BY; }
         }
     }
 
+    /// <summary>
+    /// To define member relationship for accessible object.
+    /// </summary>
     public class MemberOf : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is MemberOf.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the MemberOf type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_MEMBER_OF; }
         }
     }
 
+    /// <summary>
+    /// To define tooltip for accessible object.
+    /// </summary>
     public class TooltipFor : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is TooltipFor.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the TooltipFor type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_TOOLTIP_FOR; }
         }
     }
 
+    /// <summary>
+    /// To define child for accessible object.
+    /// </summary>
     public class ChildOf : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is ChildOf.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the ChildOf type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_NODE_CHILD_OF; }
         }
     }
 
+    /// <summary>
+    /// To define parent for accessible object.
+    /// </summary>
     public class ParentOf : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is ParentOf.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the ParentOf type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_NODE_PARENT_OF; }
         }
     }
 
+    /// <summary>
+    /// To define extend for accessible object.
+    /// </summary>
     public class Extended : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is Extended.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the Extended type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_EXTENDED; }
         }
     }
 
+    /// <summary>
+    /// To define the custom reading order.
+    /// </summary>
     public class FlowsTo : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is FlowsTo.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the FlowsTo type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_FLOWS_TO; }
         }
     }
 
+    /// <summary>
+    /// To define the custom reading order.
+    /// </summary>
     public class FlowsFrom : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is FlowsFrom.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the FlowsFrom type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_FLOWS_FROM; }
         }
     }
 
+    /// <summary>
+    /// To define subwindow for accessible object.
+    /// </summary>
     public class SubwindowOf : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is SubwindowOf.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the SubwindowOf type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_SUBWINDOW_OF; }
         }
     }
 
+    /// <summary>
+    /// To define embed for accessible object.
+    /// </summary>
     public class Embeds : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is Embeds.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the Embeds type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_EMBEDS; }
         }
     }
 
+    /// <summary>
+    /// To define embed for accessible object.
+    /// </summary>
     public class EmbeddedBy : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is EmbeddedBy.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the EmbeddedBy type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_EMBEDDED_BY; }
         }
     }
 
+    /// <summary>
+    /// To define popup for accessible object.
+    /// </summary>
     public class PopupFor : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is PopupFor.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the PopupFor type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_POPUP_FOR; }
         }
     }
 
+    /// <summary>
+    /// To define parent window for accessible object.
+    /// </summary>
     public class ParentWindowOf : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is ParentWindowOf.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the ParentWindowOf type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_PARENT_WINDOW_OF; }
         }
     }
 
+    /// <summary>
+    /// To define description for accessible object.
+    /// </summary>
     public class DescriptionFor : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is DescriptionFor.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the DescriptionFor type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_DESCRIPTION_FOR; }
         }
     }
 
+    /// <summary>
+    /// To define description for accessible object.
+    /// </summary>
     public class DescribedBy : IAccessibleRelation
     {
+        /// <summary>
+        /// Gets or sets the target object which is DescribedBy.
+        /// </summary>
         public AccessibleObject Target { get; set; }
+
+        /// <summary>
+        /// Gets the DescribedBy type.
+        /// </summary>
         public int Type
         {
             get { return (int)Interop.Elementary.Elm_Atspi_Relation_Type.ELM_ATSPI_RELATION_DESCRIBED_BY; }
diff --git a/ElmSharp/ElmSharp/AccessibleUtil.cs b/ElmSharp/ElmSharp/AccessibleUtil.cs
index 174a81b..720fca4 100644..100755
--- a/ElmSharp/ElmSharp/AccessibleUtil.cs
+++ b/ElmSharp/ElmSharp/AccessibleUtil.cs
@@ -20,14 +20,32 @@ using System.Threading.Tasks;
 
 namespace ElmSharp.Accessible
 {
+    /// <summary>
+    /// Enumeration for ReadingStatus.
+    /// </summary>
     public enum ReadingStatus
     {
+        /// <summary>
+        /// Unknown status
+        /// </summary>
         Unknown,
+        /// <summary>
+        /// Cancelled status
+        /// </summary>
         Cancelled,
+        /// <summary>
+        /// Stopped status
+        /// </summary>
         Stoppped,
+        /// <summary>
+        /// Skipped status
+        /// </summary>
         Skipped
     }
 
+    /// <summary>
+    /// AccessibleUtil provides a method to set the reading information.
+    /// </summary>
     public static class AccessibleUtil
     {
 
@@ -55,11 +73,12 @@ namespace ElmSharp.Accessible
             gch.Free();
         }
 
-        /*
-         * ReadingCancelled is never appear if discardable is true.
-         * ReadingStoppped is appear on end of normal operation.
-         * I don't know when the ReadingSkipped is appeared.
-         */
+        /// <summary>
+        /// Reads given text by screen reader.
+        /// </summary>
+        /// <param name="text">The reading text.</param>
+        /// <param name="discardable">If true, reading can be discarded by subsequent reading requests, if false the reading must finish before next reading request can be started.</param>
+        /// <returns>Return a task with reading status.</returns>
         public static Task<ReadingStatus> Say(string text, bool discardable)
         {
             var tcs = new TaskCompletionSource<ReadingStatus>();
diff --git a/ElmSharp/ElmSharp/IAccessibleObject.cs b/ElmSharp/ElmSharp/IAccessibleObject.cs
index bf633b1..f1488ff 100644..100755
--- a/ElmSharp/ElmSharp/IAccessibleObject.cs
+++ b/ElmSharp/ElmSharp/IAccessibleObject.cs
@@ -16,6 +16,9 @@
 
 namespace ElmSharp.Accessible
 {
+    /// <summary>
+    /// IAccessibleObject is a interface which defines properties and methods of accessible object.
+    /// </summary>
     public interface IAccessibleObject
     {
         ReadingInfoType ReadingInfoType { get; set; }
diff --git a/ElmSharp/ElmSharp/ReadingInfoType.cs b/ElmSharp/ElmSharp/ReadingInfoType.cs
index 846a063..35df932 100644..100755
--- a/ElmSharp/ElmSharp/ReadingInfoType.cs
+++ b/ElmSharp/ElmSharp/ReadingInfoType.cs
@@ -18,13 +18,31 @@ using System;
 
 namespace ElmSharp.Accessible
 {
+    /// <summary>
+    /// Enumeration for ReadingInfoType.
+    /// </summary>
     [Flags]
     public enum ReadingInfoType
     {
+        /// <summary>
+        /// None
+        /// </summary>
         None = 0,
+        /// <summary>
+        /// Name for reading info type
+        /// </summary>
         Name = 0x1,
+        /// <summary>
+        /// Role for reading info type
+        /// </summary>
         Role = 0x2,
+        /// <summary>
+        /// Description for reading info type
+        /// </summary>
         Description = 0x4,
+        /// <summary>
+        /// State for reading info type
+        /// </summary>
         State = 0x8
     }
 }