Extend classes and rules for third-party integrations

---
title: Extend classes and rules for third-party integrations
description: Extend and update CMDB CI Class Models app classes and rules when using third-party integration tools.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/servicenow-platform/cmdb-ci-class-models/cmdb-ci-class-models-extend.html
release: australia
product: CMDB CI Class Models
classification: cmdb-ci-class-models
topic_type: concept
last_updated: "2026-09-10"
reading_time_minutes: 1
breadcrumb: [CMDB CI class models, CMDB hierarchy, Explore, Configuration Management Database \(CMDB\), Configuration Management, Extend ServiceNow AI Platform capabilities]
---

# Extend classes and rules for third-party integrations

Extend and update CMDB CI Class Models app classes and rules when using third-party integration tools.

When using a third-party tool to integrate with ServiceNow apps, gaps can occur between the integration and different CIs. Some of the integrated tables and classes may be missing classes and rules that are not included with the CMDB CI Class Models store app.

See the release notes for all CMDB CI class models.

This section lists the classes that the CMDB CI Class Models app adds or updates. The classes and rules in the following table enable you to add and extend the CMDB CI Class Models store app for integrations.

<table id="table_usq_ttl_fnb"><thead><tr><th>

Table

</th><th>

Extends

</th><th>

Rules and related entries

</th></tr></thead><tbody><tr><td rowspan="3">

Postgresql Schema

 cmdb\_ci\_postgresql\_schema

</td><td rowspan="3">

cmdb\_ci\_db\_catalog

</td><td>

Containment rule:cmdb\_ci\_db\_postgresql\_instance-&gt;Contains:Contained By-&gt;cmdb\_ci\_postgresql\_schema

</td></tr><tr><td>

Identification Rule:

 Dependent, Attributes: name

</td></tr><tr><td>

Related Entries \(cmdb\_related\_entry\):

 -   Identifier: cmdb\_ci\_postgresql\_schema
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td rowspan="2">

Information Object

 cmdb\_ci\_information\_object

</td><td rowspan="2">

cmdb\_ci

</td><td>

Identification rule:Independent, attributes: name

</td></tr><tr><td>

Related Entries \(cmdb\_related\_entry\):

 -   Identifier: cmdb\_ci\_information\_object
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td>

Oracle Catalog

 cmdb\_ci\_db\_ora\_catalog

</td><td>

cmdb\_ci\_db\_catalog

</td><td>

Related Entries \(cmdb\_related\_entry\):-   Identifier: cmdb\_ci\_db\_ora\_catalog
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td rowspan="3">

MySQL Catalog

 cmdb\_ci\_db\_mysql\_catalog

</td><td rowspan="3">

cmdb\_ci\_db\_catalog

</td><td>

Containment rule:cmdb\_ci\_db\_mysql\_instance-&gt;Contains:Contained By-&gt;cmdb\_ci\_db\_mysql\_catalog

</td></tr><tr><td>

Identification rule:

 Dependent, attributes: name

</td></tr><tr><td>

Related Entries \(cmdb\_related\_entry\):

 -   Identifier: cmdb\_ci\_db\_mysql\_catalog
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td>

MS SQL Database

 cmdb\_ci\_db\_mssql\_database

</td><td>

cmdb\_ci\_db\_instance

</td><td>

Related Entries \(cmdb\_related\_entry\):-   Identifier: cmdb\_ci\_db\_mssql\_database
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td rowspan="3">

Sybase Catalog

 cmdb\_ci\_db\_syb\_catalog

</td><td rowspan="3">

cmdb\_ci\_db\_catalog

</td><td>

Containment rule:cmdb\_ci\_db\_syb\_instance-&gt;Contains:Contained By-&gt;cmdb\_ci\_db\_syb\_catalog

</td></tr><tr><td>

Identification rule:

 Dependent, attributes: name

</td></tr><tr><td>

Related Entries \(cmdb\_related\_entry\):

 -   Identifier: cmdb\_ci\_db\_syb\_catalog
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr><tr><td rowspan="3">

DB2 Database \(formerly DB2 Catalog\)

 cmdb\_ci\_db\_db2\_catalog

</td><td rowspan="3">

cmdb\_ci\_db\_catalog

</td><td>

Containment rule:cmdb\_ci\_db\_db2\_instance-&gt;Contains:Contained By-&gt;cmdb\_ci\_db\_db2\_catalog

</td></tr><tr><td>

Identification rule:

 Dependent, attributes: name

</td></tr><tr><td>

Related Entries \(cmdb\_related\_entry\):

 -   Identifier: cmdb\_ci\_db\_db2\_catalog
-   Related table: cmdb\_key\_value
-   Referenced field: configuration\_item

</td></tr></tbody>
</table>For the list of classes in the base system, including classes that this app might extend, see [CMDB tables descriptions](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/configuration-management-database-cmdb/cmdb-tables-details.md).

**Related topics**  


[CMDB schema model](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/configuration-management-database-cmdb/c_ConfigurationManagementDatabase.md)