If you're using Zingtree's Data Entry Fields to gather information, you can use a Custom Validation field type to ensure data is entered in a proper format. For example, a Social Security number would be entered as xxx-xx-xxxx, where x corresponds to a digit.
The validation is performed using a Javascript style Regular Expression. This is a popular, standard way of describing patterns to match for validating input. If the data entered matches the pattern described in the regular expression, then the next button click in the node is allowed to continue.
Here's how a data entry field with Custom Validation is set up.
