Access to virtual data

Astronomical data are often archived in forms which need further processing before they can be analysed or compared with other data, for example the application of quality-based flags to ISO spectra. In many cases different users need different products, such as stacked or single HST images, different resolutions for interferometry data. This can be achieved if data providers support standard data models and tools, with help from VOs (such as via Opticon and RadioNet).