anchor.diff:                      then yield element
                       else ()
               ]
  -    
  +
  +        ///<summary>
  +        ///Returns the elements under the current node that macht the
  +        ///given predicate, this also returns the node aswell if it
  +        ///matches the predicate
  +        ///</summary>
  +        ///<param name="f">The predicate to match the element</param>
  +        ///<param name="x">The given html node</param>    
           let elementsAndSelf f x = 
               [
                   if f x then yield x
  
positive.code:             match tryGetAttribute name x with
              | Some(v) -> v
              | None -> failwithf "Unable to find attribute (%s)" name
          
          let hasAttribute name (value:string) x = 
              tryGetAttribute name x
              |> function 
                  | Some(attr) ->  attr.Value().ToLowerInvariant() = (value.ToLowerInvariant())
                  | None -> false
      
          let elements f x = 
              [
                  for element in children x do
  
negative.code:             | None -> defaultValue
          
          /// <summary>
          /// Returns the attribute with the given name. If the
          /// attribute does not exist then this will thorw an exception
          /// </summary>
          /// <param name="name"></param>
          /// <param name="x"></param>
  