# Event Modeling

<mark style="color:$danger;">**This Editorial Guide is used for Education Purposes Only. It is used in the Authoring Courses and Certifications. It is based on the January 2026 Editorial Guide.**</mark>

## Event attributes

When modeling an event, be sure to model the event itself and not the *outcome* of an event. The *outcome* of an event would be a finding or a disorder.

### Causative agent

Although Pharmaceutical / biologic product (product) and its descendants are considered valid values for the Causative agent (attribute) by the MRCM, they are not currently used as values for this attribute in the International Release. The only exception is 787859002 |Vaccine product (medicinal product)| and its descendants, which *can* be used as valid values for this attribute.

### Allowed ranges

The allowed ranges will not prevent some incorrect modeling. Some allowed attributes have not yet been used for modeling in the Event domain. The planned QI project will review the modeling to ensure consistency of use the allowed attributes.

### Vaccine-related overdose

* For the January 2020 Release, vaccine-related overdose concepts in the Clinical Finding/Disorder hierarchy were inactivated. They were replaced with *excessive dose* concepts in the Event hierarchy.
* When authoring, determine whether the concept describes an overdose, a *disorder* , or the administration or ingestion of an excessive dose, an *event*.

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