Data Structures Information Model vRM 1.1.0

Data in electronic health records (EHRs) must be expressed in standard structures. Such structures include single values (e.g. weight, height, blood sugar), lists of named or numbered elements (e.g. blood test results), tables of values with named columns and/or named rows (e.g. visual acuity results), trees of values (e.g. biochemistry, microbiology results) and histories of values, each of which takes any of the above forms (e.g. a time series of blood pressures, glucose levels, or imaging data).

This document describes the common data structures used in openEHR reference models, including lists, tables, trees and history. The intended audience includes standards bodies producing health informatics standards, academic groups using openEHR, the open source healthcare community, solution vendors, medical informaticians and clinicians interested in health information, and health data managers.

Main sections:

· Overview

· Item structure package

· Representation package

· History package