org.apache.pig.data
Classes 
AmendableTuple
BagFactory
DataAtom
DataBag
DataBag.BagDelimiterTuple
DataBag.EndBag
DataBag.StartBag
DataMap
Datum
DefaultDataBag
DistinctDataBag
ExampleTuple
IndexedTuple
SortedDataBag
TimestampedTuple
Tuple