SSI Web includes many functions that can be used in various areas of the software:
Functions can be used in skip logic and list-building syntax. They can also be used in the middle of questionnaire text (such as in a Header1 section of a question), in error messages sent to respondents, or in Unverified Perl.
As an example, one might want to skip to a certain question if the length of an open-end response is fewer than 2 characters (a String Function called Length). In the question skip syntax, you might indicate to skip to Q10 if the following is true:
Length(Q8) < 2
