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In addition to the standard properties, the following properties are defined for SNOMED CT:
| Property Name | Data Type | Comments |
| inactive | boolean | Whether the code is active or not (defaults to false). This is derived from the active column in the Concept file of the RF2 Distribution (by inverting the value) |
| sufficientlyDefined | boolean | True if the description logic definition of the concept includes sufficient conditions. This is derived from the definitionStatusId value in the Concept file of the RF2 distribution (i.e. If 900000000000073002 |Sufficiently defined concept definition status| then true). |
| moduleId | code | The SNOMED CT concept id of the module that the concept belongs to. |
| normalForm | string | Generated Normal form expression for the provided code or expression. |
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For example, the laterality property is represented using the concept id '272741003', rather than the term 'laterality':
| Property Name | Data Type | Comments |
| 272741003 | code | The value of the laterality attribute in the definition of the given code or expression. The equivalent URI for the Laterality property is |
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