| AgencyId | An ID value for an identifiable item generated by the agency. The contents of the field are not known; the provider could be using a VIN number, serial number, or a sequence number. |
| InsurerId | An ID value for an identifiable item generated by the insurer. The contents of the field are not known; the provider could be using a VIN number, serial number, or a sequence number. |
| OtherIdentifier | This aggregate contains the information relating to the identification of something. |
| SystemId | A Universally Unique Identifier for an Identifiable Item. |
| VersionEndDtTime | Architectural in nature, this element is typically used only in a Resource structure. Indicates the Time and Date this Resource was cleared or ended. |
| VersionNumber | The version number of this Item Id Information aggregate. |
| VersionStartDtTime | Architectural in nature, this element is typically used only in a Resource structure. Indicates the Time and Date this Resource was established. |