Implementation of terminologies involves making choices about when to use codes and when to structure information in separate fields. Terminology binding is the process of specifying in archetypes and templates what codes belong in which fields. The model of use is how information appears to the end user. This often differs from the model of meaning, which is always true, but sometimes harder to use. It is important to distinguish between coded text, which refers to a code, and codeable text where a code reference is optional. Value sets represent the permissible codes, while a coding scheme may represent all codes in a scheme. A number of different scenarios are explored for when codes may be known or not known. The task of the receiver is critical, to ensure information is not lost.
KeywordsReference terminology Terminology binding Information model Model of use Model of meaning Structured data entry Views into EHR Common user interface Structural models Reference model ISO 13606 Archetype Template Coded data types Coded text Codeable text Null flavor Code system Version Original text Display name Translation Value set Complex coded expressions Common scenarios Coded data types in v2 V3 and FHIR Receivers Expression storage
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