I'm trying to add a reference to a route but when I add it, I'm missing the validation in the IDE
And he answers this in console:
XML validation started.
Checking file:/home/emendez/NetBeansProjects/HorarioSpring/src/main/webapp/WEB-INF/spring-mvc-servlet.xml...
Referenced entity at "http://www.springframework.org/schema/beans/spring-beans-3.0.xsd".
Referenced entity at "http://www.springframework.org/schema/context/spring-context-3.0.xsd".
Referenced entity at "http://www.springframework.org/schema/tool/spring-tool-3.0.xsd".
El prefijo "mvc" para el elemento "mvc:resources" no está enlazado. [22]
XML validation finished.
Do you know why it can be?