Complex surveys often evolve over time — questions get added or removed as the study takes shape. To avoid having to correct direct references every time, you can assign special aliases to key fields. Aliases work just like direct references but remain constant regardless of where the field is positioned. They always start with @ followed by an alphanumeric alias name (A–Z, a–z, 0–9, underscore) that you choose. An @alias references the exact field within the question where it's entered, or the question itself. Aliases must be unique within a survey.
Example
[@likesPurple] was placed in Q18 (a color preference question) on the purple answer option (A5). It's then used in a follow-up question as [Show if @likesPurple] to address only respondents who selected that answer. Q18 and A5 can now be moved to any position in the survey and the reference will still work.