The package provides classes for describing and importing external data sets.

 DataField A data field stores metadata for an individual data variable.
 DataSchema A data schema represents a set of data variables and their associated types.
 DataSet A data set is a collection of data tables.
 DataSource A data source provides access to remote data on the Internet.
 DataTable A data table maintains a collection of data objects, each representing a row of data, and an optional data schema describing the data variables.
 DataUtil Utility class for parsing and representing data field values.