[EpiData-list] creating an identifiant from various variables

Dear all,

I would have a question about the creation of an identifier for data entry. I would like the identifier to be automatically created in the .rec file after entering 4 variables and as an aggregation of these 4 variables. For instance my identifier is ID=region number+village number+household number+member in the household number Do you have any clue about how to do this? Thank you for your help. Jean-Francois