VizieR provides access to the most complete library of published astronomical catalogues (data tables and associated data) available on line and organized in a self-documented database (11769 catalogues in november 2013). The VizieR search engine use indexation based on several criteria which needs the expertise of scientists and documentalists to ingest each catalog. These metadata go with an efficient position search engine adapted to big data (Gaia simulation catalog has more than 2billions of objects) Informations in VizieR tables are well described, and can be retrieved easily. The search process gives a good visibility to catalogs with tools and protocols to disseminate data to the Virtual Observatory and thus to give the scientists data reusable by dedicated tools (e.g.: image vizualisation tools). Also, a new functionality allows users to extract all photometric data in catalogs for a position Finally, it is also through cross-identification tools that the CDS becomes a partner of producing large data sets, such as Gaia.