# CIMI Reference Model Taskforce - Mission and Approach

**Mission**

To define a candidate CIMI reference model

**Terms of Reference**

This taskforce has been established to:

1) Define a set of requirements for the CIMI reference model;

2) Define or choose a candidate CIMI reference model;

3) Work with the Clinical Modeling taskforce to test the candidate reference model in the development of a set of initial clinical information models;

4) Compare the candidate CIMI reference model with the requirements to identify gaps;

5) Present the results of the above to the next face-to-face CIMI meeting.

**Deliverables**

The deliverables of this taskforce include:

1) A set of requirements for the CIMI reference model;

2) One or more UML class diagrams, which together represent the candidate CIMI reference model;

3) An implementation of the candidate CIMI reference model that enables a set of initial Clinical Models to be created based on this reference model1 (preferably using ADL);

4) A report identifying the gaps between the proposed CIMI reference model and the requirements; and

5) A summary of the results and recommendations for the CIMI Reference Model pending CIMI approval.

--*Please note that this implementation may either be as simple as an appropriately formatted spreadsheet, or may involve a tool that is specifically designed for authoring clinical models against a given reference model – depending on the time and resources available.*

**Members**

The members of the taskforce include:

Linda Bird (Chair) – Ministry of Health Holdings, Singapore

Thomas Beale – Ocean Informatics

Michael van der Zel – Results4Care

Grahame Grieve – Health Intersections

Richard Kavanagh – NHS Connecting for Health

Josh Mandel - SMART

Stan Huff - Intermountain Healthcare

Gerard Freriks - EN13606 Association

Galen Mulrooney - ONC, U.S.A.

**Definition**

The CIMI Reference Model is the underlying Reference Model on which CIMI’s clinical models (i.e. archetypes) are defined. This reference model defines a rigorous and stable set of modelling patterns, including a set of complex datatypes, information patterns (e.g. data, qualifier, state), and structural patterns (e.g. composition, entry, tree). All CIMI clinical models (i.e. archetypes) will be defined by constraining the CIMI reference model. Each example instance of a CIMI Clinical Model will be an instance of the CIMI reference model, which conforms to the constraints defined by the associated clinical model.

**Motivation**

The motivation for including a reference model in the CIMI clinical modelling architecture is to provide a consistent computational framework upon which model authoring and translation tools can be based. The reference model is the ‘common language’ used to describe all clinical models.It provides a single information model, which can be used to represent instances of all clinical models, and upon which further constraints can be applied to represent the specific information requirements of all clinical model. This information model represents the core artefact that is implemented in software, as it provides the physical structure of the clinical models and its example instances. Existing implementation experience has shown that this increases the computational capabilities of the resulting modelling and translation tools.

**Architectural Framework**