Manage PostgreSQL schema
PostgreSQL has schema [1] and for now the postgresql backend is not aware of it.
So for example, if you want to run two trytond instances on the same database but on 2 different schema, it will not work because the backend looks for tables without taking the search_path of the user. Having this possibility will allow to make some interesting setup like sharing via the public schema some tables between tryton instance.
[1] http://www.postgresql.org/docs/current/static/ddl-schemas.html