Software that brings together information about the cited resource, the user, and the library's many subscriptions, policies, and services. For the software to work, the content providers must be willing to participate as sources (databases or sites that can provide a link from a reference). The link resolver becomes activated when the user clicks on a link or button ("Search for full text") embedded in the user interface of PubMed (or other services). Using the OpenURL framework, information is bundled together from the source and sent to the resolver software that will process the data and compare it to the Knoweldgebase. The user is then presented with a range of options for locating the article, such as a link to the online article or journal, a listing for the library's print holding for that title, interlibrary loan, or document delivery options.