I try to use categories but it doesn't allow share's user to do a research. Categories are just visible for administrator. So my objective is to have a thesaurus/taxonomy/hierarchical categories, for the share's user.
For example, a thesaurus concerning "individu" will be like this:
Lecteur
Participant
—->Éditeur non-inscrit
—->Éditeur inscrit
Participant mandaté
—->Administrateur
—->Gestionnaire
—->Représentant
…
And each users could post documents in the branch of this thesaurus thanks to tags.
thanks for your help.