Completes: U4-3052 Create TagsService

src/Umbraco.Core/Models/ContentExtensions.cs

@@ -528,6 +528,21 @@ namespace Umbraco.Core.Models
         
         #region Tag methods
 
+        ///// <summary>
+        ///// Returns the tags for the given property
+        ///// </summary>
+        ///// <param name="content"></param>
+        ///// <param name="propertyTypeAlias"></param>
+        ///// <param name="tagGroup"></param>
+        ///// <returns></returns>
+        ///// <remarks>
+        ///// The tags returned are only relavent for published content & saved media or members 
+        ///// </remarks>
+        //public static IEnumerable<ITag> GetTags(this IContentBase content, string propertyTypeAlias, string tagGroup = "default")
+        //{
+
+        //}
+
         /// <summary>
         /// Sets tags for the property - will add tags to the tags table and set the property value to be the comma delimited value of the tags.
         /// </summary>

src/Umbraco.Core/Models/TaggableObjectTypes.cs

@@ -0,0 +1,12 @@
+namespace Umbraco.Core.Models
+{
+    /// <summary>
+    /// Enum representing the taggable object types
+    /// </summary>
+    public enum TaggableObjectTypes
+    {
+        Content,
+        Media,
+        Member
+    }
+}