The beans.xml examples in "5.1.1. Declaring selected alternatives", "8.2.2. Decorator enablement and ordering for a bean archive" and "9.4. Interceptor enablement and ordering" (which contain a reference to beans_1_1.xsd) are not valid - bean-discovery-mode attribute is required. I think it would be appropriate to specify the version attribute as well.
The last beans.xml example in "12.4.2. Exclude filters" does not even define the reference to an XSD. Again, I believe the version and bean-discovery-mode attributes should be specified.