Regular Expression Check

Add the Regular Expression Check node under a User Input node to force users to enter values that only match a certain pattern. An error message notifies the user that an illegal value was entered. The Settings window has the following section:

Regular Expression

Enter the pattern in the Regular expression text field. Regular expressions supports a wide variety of string matching functionality, and the table below only list a few examples:

Expression	Matches
\w	A word character
\d	A digit
.	Any character
[a-z]	Characters between a and z.
[^abc]	Not the characters a, b, and c
\w*	Zero or more word characters
\d+	One or more digits

When the match fails for an entered value, an error message displays. Enter the error message in the Error message text field.