var hasChanges = dataTable.get_isDirty();Get updated/inserted/deleted rows
var updatedRows = dataTable.getChanges().updated;
var insertedRows = dataTable.getChanges().inserted;
var deletedRows = dataTable.getChanges().deleted;Get columns’ properties
var oCol = dataTable.getColumn(colName);
var colName = oCol.get_columnName();
var colDataType = oCol.get_dataType();
var colDefaultValue = oCol.get_defaultValue();Get DataTable from DataSet
DataSet is also an Atlas object, just like the ADO.NET object DataSet which may contain many DataTables.