--- sourceDocument: Australia ServiceNow AI Platform Capabilities sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/de-DE/servicenow-platform Release : - australia ft:locale : - de-DE ft:publication_title : - Australia ServiceNow AI Platform Capabilities ft:clusterId : - platcap bundleId : - platcap workflow : - Platform --- # Principal Class filter # Update the list of classes in the Principal Class filter {#ariaid-title1} * Freigeben Version: Australia * * Aktualisiert 12. März 2026 * * ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 3 Minuten Lesedauer A Principal Class is a designation for those CMDB classes that are most critical for foundational data health and governance in the organization. Manage the list of classes in the Principal Class filter so that those classes are prioritized for tracking, health, certification, lifecycle management, and class list views. ## Vorbereitungen Role required: sn_cmdb_admin or itil_admin, and personalize_dictionary ## Warum und wann dieser Vorgang ausgeführt wird In a base system, the Principal Class filter doesn't contain any classes. Designating certain CMDB classes as principal classes is a strategic way to focus your CMDB and governance on the CIs that matter most to day-to-day operations. Principal classes identify the classes that are in scope for operational processes---such as change, incident, problem, and quality management. Those classes represent the most critical infrastructure components with meaningful service impact. Limiting some CMDB functions to this set of most essential classes can help organizations improve data quality and ownership, reduce noise in reporting and impact analysis, and more consistently measure health, compliance, and operational risk where it counts. General guidelines for designating a class as principal: * Consider stability and business impact: Choose those classes that are stable, well-understood, and have a direct impact on business operations. * Prioritize core infrastructure: When in doubt, select those classes that represent the backbone of your IT environment. * Consult stakeholders: Engage with infrastructure, application, and security teams to validate your selections. * Review regularly: As your environment evolves, periodically review and update principal classes to ensure continued relevance. {#update-principal-class-filter__ul_qps_1cg_yhc}For more information, see the [Guidance on designating principal classes in the CMDB \[KB2707240\]](https://support.servicenow.com/kb_view.do?sysparm_article=KB2707240) article in the Now Support Knowledge Base. The Principal Class filter has uses across the CMDB, such as: * In CI lists and dashboards: The Principal Class filter restricts CIs to only those in the filter, so you can focus on those CIs that require attention. For more information about list view filters, see [Save and use filters in a list view](https://www.servicenow.com/docs/access?context=t_SavingFilters&version=australia&pubname=australia-platform-user-interface&ft:locale=en-US). * CMDB Workspace: You can apply the Principal Class filter in the Discovery sources card in the CMDB 360 dashboard. For more information, see [CMDB 360 experience in CMDB Workspace and in Service Graph Workspace](https://servicenow-prod.fluidtopics.net/e~AK3tKMymU65vt8pSKiEQ "The CMDB 360 view in CMDB Workspace and in Service Graph Workspace provides aggregations and analysis of CMDB 360 data which you can use to track activities and identify Potential issues of discovery sources. You can also create different types of your own queries and associated schedules and reports to explore CMDB data."). * CMDB success advisor: CMDB success advisor dashboards rely on principal classes to generate recommendations and KPIs. You can set principal classes in CMDB success advisor for Data Foundations to track the foundational data health of your CMDB. This alignment ensures that insights reflect actual business priorities. For more information, see [CMDB success advisor](https://servicenow-prod.fluidtopics.net/ORopCQ_QBuIDOGjCPyfEqw "The ServiceNow CMDB success advisor is a scoped application that drives business outcomes for targeted business products, including Data Foundations and Hardware Asset Management, by improving Configuration Management Database (CMDB) data quality. Use a specialized advisor to resolve data quality issues through guided remediation, and identify which data integrations are keeping your CMDB accurate and complete."). * HAM (Hardware Asset Management) integration: When model categories are added to the CMDB success advisor for HAM, they are marked as principal classes if they weren't already and will appear in the CMDB success advisor for Data Foundations if already set up. For more information, see [Using CMDB success advisor for HAM](https://servicenow-prod.fluidtopics.net/80GgZO9VXYaIo7BKxsPqLA "As a CMDB administrator, you can use the Hardware Asset Management (HAM) dashboard in CMDB success advisor to keep hardware asset data accurate and aligned with data quality guidelines."), [Hardware Asset Management](https://www.servicenow.com/docs/access?context=ham-landing-page&version=australia&pubname=australia-it-asset-management&ft:locale=en-US), and [CMDB CI Class Models app](https://servicenow-prod.fluidtopics.net/VzkxeWzQzhMzcJt3LjhdlA "The CMDB contains base-system classes that store data about configuration items (CIs). The CMDB CI Class Models ServiceNow Store app adds class models that extend the CMDB class hierarchy, including class descriptions, identification rules, identifier entries, and dependent relationships if applicable."). * Principal CI class agent in Now Assist for CMDB: This agent suggests classes to be set as principal classes, and then automates setup for consistency across environments. For more information, see [Getting advice from Now Assist on CMDB governance](https://servicenow-prod.fluidtopics.net/CDw2pz4jfQO0stoiv1yAjw "Data governance can be an overwhelming task. The Provide advice on CMDB governance agentic workflow supports data admins and owners by methodically working through the many-faceted process of improving CMDB data accuracy, completeness, and health. The objective is to ensure that users can trust the data that they use for their work."). {#update-principal-class-filter__ul_e14_bvs_khc} The Principal Class setting applies only to the current class and is not derived by child classes. For details about the CMDB class hierarchy, see [CMDB schema model](https://servicenow-prod.fluidtopics.net/exsuXtWUhrhgmNv~lbMf2Q "The CMDB schema model is a series of connected tables that contain all the assets and business services controlled by a company and its configurations."). ## Prozedur 1. Navigate to AllConfigurationCI Class Manager. 2. Select Hierarchy to expand the CI Classes list and then select a class to add or remove from the Principal Class filter. 3. On the class navigation bar, navigate to Class InfoBasic Info. 4. On the Basic Info form, select or clear Principal Class. 5. Select Save. ## Ergebnisse The Principal Class filter is updated with the addition or the removal of the class from the list of classes in the filter. When you apply the Principal Class filter to a Configuration Items list view, only CIs from classes included in the filter, appear. ## Nächste Maßnahme In both of the following scenarios, the list of CIs refreshes to show only CIs whose class is included in the Principal Class filter. * Scenario 1: 1. In the Filter navigator, type cmdb_ci.list and then press the Enter key. 2. In the Configuration Items list view, select the List controls menu icon, select Filters and then select Principal Class. {#update-principal-class-filter__ol_gls_bg3_3jb} * Scenario 2: 1. Open a Change Request form. 2. Scroll down and select the Affected CIs tab. Select Add. 3. In the Add Affected CIs form, select the List controls menu icon, select Filters and then select Principal Class. {#update-principal-class-filter__ol_nxz_dg3_3jb} For more information about adding affected CIs to change requests, see [Associated CIs on a change request](https://www.servicenow.com/docs/access?context=c_AffectedCIsAndImpactedServices&version=australia&pubname=australia-it-service-management&ft:locale=en-US). {#update-principal-class-filter__ul_ypx_tcx_sjb} **Zugehörige Konzepte** * [Dependent CIs management](https://servicenow-prod.fluidtopics.net/ZQ20ymlZAuynWHpvo1sEbw "A life cycle update for a CI affects its dependent CIs. For example, when the CI that a dependent CI depends on is deleted, the dependent CI becomes orphan with no further use. To maintain the integrity and health of the CMDB, the system applies cascade-cleanup processes to dependent CIs that are affected by a life cycle update.") **Zugehörige Tasks** * [Create a CI class](https://servicenow-prod.fluidtopics.net/cvLYgpMnJZy0dTnsiMj67Q "Create a CI class (table) that is an extension of an existing CI class. Then create identification and reconciliation rules for the new class.") * [Reclassify a CI](https://servicenow-prod.fluidtopics.net/0HOIvUaokimH~_EzVQ4ASw "You can upgrade, downgrade, or switch the class of a CI by modifying its Class attribute.") * [Delete CIs](https://servicenow-prod.fluidtopics.net/JrEMwREQO2Ak79CwJ7o0nA "You can use the CI Class Manager to delete CIs that are no longer needed.") * [View and edit class definitions and metadata](https://servicenow-prod.fluidtopics.net/9vBerosZhj6TjgpWOsCU1g "Use the CI Class Manager as a central location to explore the CMDB class hierarchy, CI table definitions, and class CIs. View the details of each table such as its label and fields, relationships, and all related metadata definitions.") **Zugehörige Verweise** * [CMDB record types](https://servicenow-prod.fluidtopics.net/OlPoaMlkHkSNiXOULsk6TA "The CMDB contains the following major record types.") * [Related Lists of CI components](https://servicenow-prod.fluidtopics.net/QlkhckVptam91MkXwbohtg "Related lists in CI records display additional components contained by that CI, such as disk drives on a server and the rules that control the behavior of a network router.")