Catalog management at CDS

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.