Next: The CDS Information Hub . ... In this context, the CDS (Centre de Donn?es astronomiques de Strasbourg) has developed the GLU system (G?n?rateur de Liens Uniformes). This tool allows all managers participating in the system to describe and easily distribute the URL definitions required to access their databases. ... So, the GLU system is particularly adapted to design cooperative Web services, allowing one to generate links to other services which remains always up-to-date. ...