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

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama Operational Technology Management

ft:clusterId :

    - optm

bundleId :

    - optm

workflow :

    - Technology


---

# Operational Technology Manager (OT) configuration item extension classes

# Operational Technology Manager (OT) configuration item extension
classes {#ariaid-title1}

Release version: Yokohama  
Updated January 30, 2025  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Operational Technology Manager uses Operational Technology (OT) configuration item (CI) extension classes that extend the
CMDB class hierarchy as shown in the following
figure.  
Figure 1. OT CI extension classes equals OT devices

Operational Technology Manager includes class descriptions, identification
rules, identifier entries, and dependent relationships, if applicable. The Service Graph applications use these class extensions to populate CIs and discover
various technologies and software. To learn more, see [Operation Technology (OT) extension
classes](https://www.servicenow.com/docs/access?context=cmdb-ci-class-models-operation-technology&version=yokohama&pubname=yokohama-servicenow-platform&ft:locale=en-US).