yield {"id" : id,
       "slot" : slot,
       "start" : start,
       "end" : end,
       "length" : length,
       "size" : size,
       "description" : description}

yield {"id"          : id,
       "slot"        : slot,
       "start"       : start,
       "end"         : end,
       "length"      : length,
       "size"        : size,
       "description" : description}