REST: Post XML to Update List Item

I need to use vCenter orchestrator to update item in SharePoint list.

Using rest plugin, I post the following XML to SharePoint.

 


   
   http://172.20.34.33/_vti_bin/listdata.svc/Rest(4)
    
    2011-11-07T17:39:56+08:00
    
      
    
    
      
        0x0100B0118C4AF8B98C408EDC3A87238E73F5
        4
        4
  haha
        Item
        /Lists/rest