lib/atom/element.rb in atom-tools-2.0.2 vs lib/atom/element.rb in atom-tools-2.0.3

@@ -286,13 +286,17 @@
         e.set(name, x)
       end
 
       self.on_build do |e,x|
         if v = e.get(name)
-          unless x.namespaces[ns[0]]
-            x.add_namespace *ns
+          n = name.to_s
+
+          if x.namespace != ns[1]
+            x.add_namespace *ns unless x.namespaces[ns[0]]
+            n = "#{ns[0]}:#{n}"
           end
-          x.attributes["#{ns[0]}:#{name}"] = v.to_s
+
+          x.attributes[n] = v.to_s
         end
       end
     end
 
     # an XML attribute in the Atom namespace