---
sourceDocument: Australia Operational Technology Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/operational-technology

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia Operational Technology Management

ft:clusterId :

    - optm

bundleId :

    - optm

workflow :

    - Technology


---

# Operational Technology (OT) extension classes installation

# Operational Technology (OT) extension classes installation {#ariaid-title1}

Release version: Australia  
Updated March 12, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
You must install the Operational Technology (OT) extension classes that
are the foundation of the Operational Technology Manager.

You can access the OT extension classes by installing the CMDB CI Class Models application. For more information about installation, see [CMDB CI Class Models app](https://www.servicenow.com/docs/access?context=cmdb-ci-class-models&version=australia&pubname=australia-servicenow-platform&ft:locale=en-US).  
The OT extension class model extend the Configuration Management Database (CMDB) class hierarchy, which includes the following information:

* Class descriptions
* Identification rules
* Identifier entries
* If applicable, dependent relationships

{#install-operation-technology-ot-extension-classes__ul_e4l_dqq_fgc}Applications, such as Discovery and Service Graph Connectors, use these class extensions to populate configuration items (CIs) and discover various technologies and software. For more information about the OT extension classes, see [Operational Technology (OT) extension classes](https://www.servicenow.com/docs/access?context=cmdb-ci-class-models-operation-technology&version=australia&pubname=australia-servicenow-platform&ft:locale=en-US).