Understanding xml Schema

Question

I am trying to understand the xmlns definition point of the following xml file:

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">   
</beans>

I did not understand what is indicated here by schemaLocation. Why, for instance, should be added to both attributes xmlns:mvc = "http://www.springframework.org/schema/mvc", and http://www.springframework.org/schema/mvcan attribute schemaLocationto use mvc:xxx_something_xxxin my spring config file?

I just want to understand what I do every time I start creating spring-mvc applications, and not just copy them from Google without understanding.

Answer 1

xmlnsdefines a namespace. If you want to use mvc:xxx, you must determine what a namespace is mvc.

xsi:schemaLocation , XSD ( XML).

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• "xmlns" XML ?
• xsi: schemaLocation?

Answer 2

:

• xmlns:mvc="http://www.springframework.org/schema/mvc" - , : ", " mvc " XML-, "; xmlns ,
• schemaLocation="http://www.springframework.org/schema/mvc" - , Java Linux, , XML- XSD; , XSD

, ( xmlns="http://www.springframework.org/schema/beans").

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