If one links the patron ID file with the historical use data by using a transforming function which computes easily from patron to circulation data, but not easily from use data to patron identity, some degree of security is maintained. A retrieval system based on circulation data would be required to return those other items checked out by the patrons who had checked out some percentage of the items on a query list. Both direct matching and a weighted vector model are analyzed to show that efficiency and patron privacy can both be maintained. Labeled, Typed Links as Cues when Reading Hypertext Documents Lisa Baron, Jean Tague-Sutcliffe, Mark T. Kinnucan, and Tom Carey A hypertext link may be organizational in the sense that its purpose is to indicate the structure of the document as organized for presentation. Baron, Tague-Sutcliffe, Kinnucan, and Carey test three classes of other than organizational links.
Semantic links represent associations among words.
Rhetorical links are used to create a path which will convince or educate a reader. Pragmatic links express a relation between a text and its possible use. Subjects in a browsing task were tested on content assimilation, and surveyed as to attitude toward the system. In the querying task subjects were asked a series of data specific questions using the system while accuracy, time and number of screens viewed were recorded. Labeling reduced the use of semantic links but had little effect on the use of rhetoric or pragmatic links.