  Nowadays medium-large size astronomical projects have to face the management
of a large amount of information and data. Dedicated data centres manage the
collection of raw and processed data and consequently make them accessible,
typically as static files, either via (s)ftp or http (web). However the various
steps of data acquisition, archiving, processing and delivering are
accomplished by different tools. The data production information (logging) is
not always collected into relational databases tables causing long delays
before people know about their existence. Luckily the use, in many cases, of
standard file formats like FITS can help to track the data origin and
processing status. As Virtual Observatory standards will become more common,
things will quickly improve. Here we present a software library we implemented
in order to use a unified model in astronomical data treatment. All the data
are stored into the same database becoming available in different forms to
different users with different privileges.
