... These services allow to directly access IDA and XSA metadata and data products without going through the archives usual user interfaces. These services have been adapted to existing VO standard, in particular the SIAP (Simple Image Access Protocol). ... With the existence of our AIO system to provide inter-operability to our archives and the advent of the SIAP, it appeared natural to us that the AIO system should be adapted to be able to support SIAP standard. ... Figure 2: VO AIO Architecture . ...