Resolution of disputes presented before the courts follow the doctrine of stare decisis. This doctrine is predicated on the principle that previously decided cases should serve as a model when resolving disputes with similar legal principles or fact patterns. Whether referencing earlier cases to either argue a case should be decided in the same manner or the case under review is sufficiently different, reflects the foundation for a chain of reasoning upon which stare decisis is constructed.
As part of the process of Shepardizing to determine if a case has been overturned, reaffirmed, questioned, or cited by later cases, lists of cases, statutes, and other resources are compiled. These lists are referred to as citators and there are two types:
Specifically, citators are used to:
After entering a search and displaying the results, next to each citation is a Shepard's Signal Indicator detailing the subsequent history and treatment of a particular case. In addition, Shepard's reports include Phrase Level Indicators that reflect the value of the editorial phrase. To the right of the cases being cited is a Depth of Discussion Indicator which assesses the various ways citing documents consider the cited reference.