External Reference Variable is an another variable which can be used to pass in data to the Survey. The External Reference variable (ext_ref) is used to associate responses to their respondents. You can assign an ID number or anything else that will uniquely identify a respondent to the ext_ref variable. When the results are collected, the ext_ref variable is captured and stored with the other data.
How can I use the ext_ref variable with my own email program?
Every survey that you create will have a unique URL. To include other data to be captured along with the survey data you just need to add the ext_ref parameter to the URL. For example:
Replace xxxx with your unique id for the respondent.
I am using a customized URL. How can I pass the ext_ref variable in the customized URL?
The ext_ref parameter can be passed along with the URL by appending the suffix “?ext_ref=xxxx” to the URL as shown in the following example.
The ext_ref tag is appended as follows: http://test.questionpro.com/?ext_ref=xxxx
Are there any limitations to the ext_ref variable?
How can I use the ext_ref with the QuestionPro Email List Manager?
If you are using the email list management interface to send out email, add the following tags to your survey invitation:
The &ext_ref variable is automatically captured in the raw response data.
Note: The mail merge tags are special variables that are used in Email List Management in tracking the email addresses of respondents. Simply append the &ext_ref=xxxx to the end of the mail merge tags.
License & Access Options
This feature/tools described here are available with the following license(s) :