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The import tag allows to import other configuration files using URLs that are configuration manager specific. For more details about which supported URLs, refer here.
Example: Configuration file containing imports
<import>war:/conf/common/common-configuration.xml</import>
<import>war:/conf/common/logs-configuration.xml</import>
<import>war:/conf/database/database-configuration.xml</import>
<import>war:/conf/jcr/jcr-configuration.xml</import>
<import>war:/conf/common/portlet-container-configuration.xml</import>
...