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Changes between Version 17 and Version 18 of LEGACY - i2b2 - The algorithms applied to importing a PDO

-              v17
+              v18
 Remember that each of the above is a separate transaction. Each step cannot be undone once committed, although presumably step/txn 4 is the most critical.
 If anything goes wrong and a transaction has begun but has not been committed, then it is rolled back and the remaining steps passed over.
+If anything goes wrong and a transaction has begun but has not been committed, then it is rolled back, the remaining steps passed over and another status message is raised ("ERROR").
 The controlling process controls whether the temporary table is deleted or not. If the appropriate flag is set in the web service message that triggers the loader, then the temporary tables can be left in place. A good debugging feature.
+The controlling process decides whether the temporary table is deleted or not. If the appropriate flag is set in the web service message that triggers the loader, then the temporary tables can be left in place. A good debugging feature.
+If an error does occur, the overall loading process is terminated, so the situation can be one of uncertainty. For example, the process could be terminated after three of the seven sub-sets had been processed.