def lookupFieldData( fid )
      @field_data = nil
      if @field_data_list
         @field_data_list.each{ |field|
            if field and field.is_a?( REXML::Element ) and field.has_elements?
               fieldid = field.elements[ "fid" ]
               if fieldid and fieldid.has_text? and fieldid.text == fid.to_s
                 @field_data = field
               end
            end
          }
      end
      @field_data
   end
def lookupFieldData( fid )
      @field_data = nil
      if @field_data_list
         @field_data_list.each{ |field|
            if field and field.is_a?( REXML::Element ) and field.has_elements?
               fieldid = field.elements[ "fid" ]
               if fieldid and fieldid.has_text? and fieldid.text == fid.to_s
                 @field_data = field
               end
            end
          }
      end
      @field_data
   end
Returns the XML element for a field returned by a getRecordInfo call.