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Realm can be marked as a template. This means that if a different realm name is requested using the API and such name contains template realm as a prefix then this realm configuration will be used
<realm>
<id>idm_realm</id>
<repository-id-ref>DefaultRepository</repository-id-ref>
<identity-type-mappings>
<user-mapping>USER</user-mapping>
</identity-type-mappings>
<options>
<option>
<name>template</name>
<value>true</value>
</option>
</options>
</realm>
In this example for "idm_realm_foo" framework will return "idm_realm" configuration. Request for "foo" realm won't return valid configuration.
<realms>
<realm>
<id>idm_realm</id>
<repository-id-ref>DefaultRepository</repository-id-ref>
<identity-type-mappings>
<user-mapping>USER</user-mapping>
</identity-type-mappings>
</realm>
</realms>
<repositories>...</repositories>
<stores>...</stores>
<options>
<option>
<name>defaultTemplate</name>
<value>idm_realm</value>
</option>
</options>
The "defaultTemplate" option defines idm_realm as the one that should be used when requested realm name is not found in configuration