I read chapter "12.1 Bean archives" which defines 'explicit bean archive' and 'implicit bean archive' and following that I removed beans.xml from my existing application only to find out that deployment of my app now fails because of unsatisfied dependencies. It took me a while to figure out the problem: there is behavioural difference between explicit and implicit bean archive which is mentioned later in the middle of chapter "12.4 Bean discovery":

The container discovers:
• each Java class, interface or enum deployed in an explicit bean archive, and
• each Java class interface, or enum with a bean defining annotation in an implicit bean archive.

The fact that implicit bean archive provides only beans with defining annotations is very important piece of information and I would like to suggest to mention that early in chapter 12.1 when the bean archive concepts are defined. Thanks.