Extensible user data fields

During the 3 coming days, I will be developing a feature for Dokeos that allows a Dokeos administrator to add data to users' profiles. For example, you will be able to add an age (or better, a date of birth), a sex, a mother tongue, etc. Whatever you want, basically. Once these fields are setup and filled, you will be able to limit the statistic results to only a subset of users (i.e.