Sets the regular expression that should match the field's text.
Note: For details on regular expression syntax supported in ABBYY Real-Time Recognition SDK, see the Regular Expressions section.
Important! If the field contains two or more matches for the specified regular expression, the engine will extract and return only the first one.
IFieldBuilder setRegEx( String regEx );
A string describing the regular expression.
The method returns the IFieldBuilder instance to which it belongs.