<https://brdpro.com/2020/07/30/popular-validation-rules-for-salesforce-flows-including-phone-email-and-address-fields/#article>
<http://schema.org/headline>
"Popular Validation Rules for Salesforce Flows including Phone, Email and Address Fields"
<https://brdpro.com/2020/07/30/popular-validation-rules-for-salesforce-flows-including-phone-email-and-address-fields/>