WebService & URN Syntax

 Hi All,
 
I need your help.
I have a struct called RECT
struct rect
{
      int x;
      int y;
      int width;
      int height;

 }
and a web service look like:
namespace Test.Geometry
{
    /// <summary>
    /// Summary description for Verification
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    public class BaseGeom : System.Web.Services.WebService
    {
        [WebMethod]
        public rect GetRect("Parameters")
    ...