Annotation	xml element(s)	default value
@Stateless	<session> <ejb-class> <session-type>Stateless</session-type>
name	<ejb-name>	The simple name of the bean class. For org.acme.superfun.WidgetBean the ejb-name will be WidgetBean
description	<description>
mappedName	<mapped-name>
@Stateful	<session> <ejb-class> <session-type>Stateful</session-type>
name	<ejb-name>	The simple name of the bean class. For org.acme.superfun.WidgetBean the ejb-name will be WidgetBean
description	<description>
mappedName	<mapped-name>
@MessageDriven	<message-driven> <ejb-class> <session-type>Stateful</session-type>
name	<ejb-name>	The simple name of the bean class. For org.acme.superfun.WidgetBean the ejb-name will be WidgetBean
description	<description>
mappedName	<mapped-name>
messageListenerInterface	<messaging-type>	The interface the bean class implements. When relying upon the default is illegal for the bean to implement more than one interface
activationConfig[]	<activation-config>
@ActivationConfigProperty	<activation-config-property>
propertyName	<activation-config-property-name>
propertyValue	<activation-config-property-value>
@RemoteHome	<home> <remote>	The home is inspected to determine the value of <remote>
@LocalHome	<local-home> <local>	The local-home is inspected to determine the value of <local>
@TransactionManagement	<transaction-type>	TransactionManagementType.CONTAINER
@TransactionAttribute	<container-transaction> <transaction-attribute>	All method default to TransactionAttributeType.REQUIRED
@RolesAllowed	<method-permission> <role-name>
@PermitAll	<method-permission> <unchecked>	All methods default to unchecked
@DenyAll	<exclude-list>
@RunAs	<security-identity> <run-as> <role-name>
@DeclareRoles	<security-role-ref>
@Interceptors	<interceptor> <interceptor-binding> <interceptor-class>
@ExcludeDefaultInterceptors	<interceptor-binding> <exclude-default-interceptors>
@ExcludeClassInterceptors	<interceptor-binding> <exclude-class-interceptors>
@AroundInvoke	<around-invoke>
@PostConstruct	<post-construct>
@PreDestroy	<pre-destroy>
@PrePassivate	<pre-passivate>
@PostActivate	<post-activate>
@Init	<init-method>
@Remove	<remove-method>
retainIfException	<retain-if-exception>	false
@Timeout	<timeout-method>
@ApplicationException	<application-exception> <exception-class>
rollback	<rollback>	false
@EJB	<ejb-ref> <ejb-local-ref> <injection-target>
name	<ejb-ref-name>	on class: illegal to leave undefined on field: {className}/{fieldName} as in org.superbiz.Widget/myEjb on setter: {className}/{propertyName} as in setMyEjb() defaults to org.superbiz.Widget/myEjb
beanInterface	<home> <local-home> <remote> <local>	on class: illegal to leave undefined on field: the data type of the field on setter: the data type of the first method param
beanName	<ejb-link>
description	<description>
mappedName	<mapped-name>

@EJB used on a class replaces <ejb-ref> and <ejb-local-ref>. @EJB used on a field or setter method (private or public) request injection of that EJB as well. When @EJB is used on a class the "beanInterface" attribute is required. When used on a field or setter method, the "beanInterface" attribute defaults to the type of the field or setter method.

@Resource used on a class replaces <env-entry>, <resource-ref>, <resource-env-ref>. @Resource used on a field or method (private or public) requests injection of that resource. When @Resource is used on a class, the "type" attribute is required. When used on a field or method, the "type" attribute defaults to the type of the field or setter method.

There are more annotations obviously, but these are fairly simple and get rid of a ton of xml.