Also, there are cases where the status of the service does not require agreements with the consumers, for example, a mandatoryservice like system security service.
同样，还有一些情况下服务身份并不需要消费者的同意，如系统安全服务这样的强制性服务。
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During initialization, the Blueprint Container ensures that mandatoryservice references are satisfied, registers all the services into the service registry, and creates initial component instances.
Before 2005, the most common strategy was compulsory rural service bonds and mandatory rural service for preferential admission into post-graduate programmes.