Settings

Represents the organization settings related to a feature. For example, your password policies, session settings and network access controls are all available in the SecuritySettings component type. For more information, see Settings.

This setting is documented in the Metadata API Developer Guide.

IncidentMgmtSettings
ReleaseMgmtSettings

Represents the settings for enabling Release Management features of IT Service Management.
ServiceItsmIntelligenceUddSettings

Represents the settings for enabling IT Service Management (ITSM) Intelligence features, including Proactive Assistance, Einstein for Incident Management, and IT Service Agent capabilities.