Difference between Spring DOCTYPE and <beans> tag

Question

In Spring there is a XML configuration for bean right?

What is the difference between:

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

and

<beans xmlns="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-3.0.xsd">

Also i'm a bit curious with the difference between SpringMVC, MVC and just Spring

Answer 1

Difference is in formats of documents definitions. First is called DTD, second - XSD. Both are used to describe possible contents of xml document. DTD is older than XSD. XSD is more flexible and powerful than DTD. More differences you can see here.