SFX?
From the SFX website: SFX is a context-sensitive link server from Ex Libris that allows context-sensitive linking between Web resources in the scholarly information environment. SFX is OpenURL-compliant, in that it accepts an OpenURL as input from an Information Resource known as an SFX source. An SFX server facilitates the management of a library’s interlinked electronic collection, by providing libraries with an independent means of enabling seamless interconnectivity among their ever-increasing collections of heterogeneous resources. The SFX system requires a resource to generate an openURL. An openURL consists of an HTTP request and delivery of metadata about a reference to a third party target. SFX works as a link server, sitting between the resource and the target. The SFX server accepts the metadata from the openURL, parses (or analyzes) it, and dynamically creates a link to the target services available for that particular object.
