A system and method validating entry of data into a structured data file in real-time is described. The system and method also described a real-time validation tool that enables a developer to create custom validation rules. These custom validation rules can include preset validation rules, which the...http://www.google.com/patents/US20040189708?utm_source=gb-gplus-sharePatent US20040189708 - System and method for real-time validation of structured data files
