[As we continue with this series, we will refer to some content and examples from the CDI 2.x specification].
In order for the CDI container to recognize your bean for injection, your bean needs to be qualified. This can be achieved by associating a bean with a qualifier type. A qualifier type represents some client-visible semantic associated with a type that is satisfied by some implementations of the type (and not by others). In other words, a qualifier type identifies a bean with a type that can be satisfied to one specific implementation of the same type (else it becomes an unsatisfied dependency).