allow RdvQueryProviderInfo to be deserialised

src/Yavsc.Abstract/Relationship/Position.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel.DataAnnotations;
+using Yavsc.Attributes.Validation;
+
+namespace Yavsc.Models.Relationship
+{
+    /// <summary>
+    /// Position.
+    /// </summary>
+    public class Position: IPosition
+	{
+		/// <summary>
+		/// The longitude.
+		/// </summary>
+        [YaRequired(),Display(Name="Longitude")]
+        [Range(-180, 360.0)]
+
+		public double Longitude { get; set; }
+
+		/// <summary>
+		///
+		/// The latitude.
+		/// </summary>
+        [YaRequired(),Display(Name="Latitude")]
+        [Range(-90, 90 )]
+		public double Latitude { get; set; }
+
+	}
+}