System variables

The systemvar tag denotes that variables will be hidden from the respondent view and stored in the System fields chapter in the reporting field tree. 

ITIME. Interview time in minutes
systemvar: y
type: codednumber
datatype: whole
cvalue: int(($elapsed/60)+0.5)

In the example above, QITIME will calculate the amount of time a respondent spent in the survey in whole minutes. Since this does not need to be seen in the usual Survey Fields chapter, the systemvar tag is applied so that it is stored in the System fields chapter. 

Details

• The systemvar tag accepts 'y' and 'n' inputs.
• The systemvar tag can be added to a question, class, table, or group, or included under the set defaults widget. 
• System variables are excluded by default from any data exports and are not included in the data map layout for fixed field exports.