Many clinical applications include data entry interfaces controlled or assisted by  protocols, templates or structured data entry forms. Each field on a data entry form may allow only a limited set of terms or concepts to be entered . The set of candidate   or  concept may range from very small (e.g. a set of priorities for a procedure) to very large (e.g. any general diagnosis). can be used to restrict the possible values that meet the requirements of a particular data entry protocol.

Examples of using reference sets to support search and data entry include:

A can use an appropriate to display the valid data entry options and constrain text searches. For more detailed use case examples, please refer to the following sections: