Why do I need a "bean:" prefix here? - spring

Question

I'm trying to cope with Spring Security and I think I got it work so far but can somebody explain to me a few things here? In particular I would like to know why I need to use this beans: prefix in this configuration file:
<beans:beans xmlns="http://www.springframework.org/schema/security"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-4.0.xsd">
<beans:import resource="applicationContext-jooq.xml"/>
<global-method-security pre-post-annotations="enabled" secured-annotations="enabled" />
<http auto-config="true" >
<intercept-url pattern="/**" access="hasRole('ROLE_ADMIN')" />
</http>
<authentication-manager >
<authentication-provider>
<user-service>
<user name="admin" password="admin" authorities="ROLE_ADMIN" />
</user-service>
</authentication-provider>
</authentication-manager>
<!-- BEGIN Services -->
<beans:bean id="loginService" class="com.mz.server.web.service.LoginService">
<beans:constructor-arg>
<beans:ref bean="dsl" />
</beans:constructor-arg>
</beans:bean>
<!-- END Services -->
</beans:beans>
Another thing I'd like to understand is the difference between
<intercept-url pattern="/" .. />
<intercept-url pattern="/*" .. />
<intercept-url pattern="/**" .. />

Answer 1

You mixxed up your xml-header where spring-security is your root-header now.
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:security="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-4.0.xsd"
........> </beans>
Second Question:
The difference between * and ** is that the * only describes the same folder, while ** is recursive. I am not sure about a / without regex, but i think it won't protect.