Implementing custom script validators
Data identifiers combine pattern matching with data validators to detect content. Validators are validation checks applied to the data that is matched by a data identifier pattern. Validators help refine the scope of detection and reduce false positives.
Symantec Data Loss Prevention
provides more than 35 validators to verify data patterns. In addition, you can use the DLP Scripting Language to write your own custom script validators.See Creating custom data identifiers for details on implementing custom data identifiers.