Can a variable in a roster be an identifier or be prefilled

Syntax
#1

Can a variable in a roster like age be prefilled (identifier).

We are having a challenge. In this survey we have four modules (the
interviewer visits the DU 4 times). On the second visit, the interviewer
continues with module 2. The continuation on the second visit or module
2 requires some of the variables from the roster in module 1. We have
divided the questionnaire into 4 modules and for each visit a module is
assigned to the interviewer.

Regards
Rabelani

#2

A variable inside the roster may be preloaded (assigned an initial value during the assignment creation process), but can’t be made identifying.