Hierarchy: a new ADC 2.0 survey control By Paul Nevin Askiadesign 12th September 2014 ShareFacebookLinkedInTwitter Just to let you know we’ve just added an article in the Help Centre about Hierarchy, a new ADC 2.0 control designed by Mamadou. You can find the latest version of the ADC, an example .QEX file as well as a test link to view it live (there are 3 screens in the survey). You also got a small video explaining how use the control and create the database. Here is the detailed KB article.