VOClient: Application Integration in the Virtual Observatory

Statistics – Applications

Scientific paper

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Scientific paper

We present VOClient, a new software package that provides a high-level, easy-to-use, programmable interface between desktop applications and the distributed VO framework, providing access to remote VO data and services, reference implementations for VO data-providers and end-user applications. Applications have traditionally been written to deal directly with local images, catalogs or spectra; VOClient allows these applications to use remote VO data and services without requiring a developer to know the details of the underlying and evolving VO technologies. The programmable interface provides equivalent functionality for a wide variety of both legacy and modern development languages and environments and can be easily extended to add new functionality. The server component of the project provides a reference implementation and toolkit which can be used to build VO data services, and the commandline tools provide ready-to-use applications to access VO data and services from the desktop or scripting environment.
The use of VOClient to integrate VO technologies with legacy systems such as IRAF is examined as a case-study, and the use of these techniques in other environments, especially their applicability to legacy code and systems, is also discussed. VOClient is meant both for the astronomer wishing to revive an old and trusted task with new VO capabiities, as well as the institutional project providing data or services to the Virtual Observatory.

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