Web 2.0 has raised new expectations from the library users : after
reading a book, they wish to rate it, provide some comments or review
about it and tag it for themselves or for others. They also expect to
discover other interesting books thanks to the contribution of other
people. Those functions, summarized under OPAC 2.0, are now provided by
several Integrated Library Systems (ILS), at least partially. But, due
to the slow development of some products, other paths were also
explored: Content Management Systems (CMS) or specific software. CMS
does provide the required functionalities like tagging and commenting.
Some pioneers thus decided to develop a new Web OPAC based on CMS.
Another approach was to build an OPAC that is independent from any ILS
and which offers the required functionalities. In this paper, we propose
to review the options available for the librarians wishing to offer Web
2.0 functionalities to their users. We also provide a synthesis of our
own experience in implementing an OPAC 2.0 into our Library.