In Spring based applications, p-NameSpace (Parameter Namespace) provides a substitute for Property tag. With the help of "p-Namespce", it helps to inject the dependency Injection by allowing direct to use bean tag irrespective of property tag.
The benefits of using p-namespce are as follows :

• Using "p" as tag is more compact than property tag
• Simplifies the setter-based dependency injection code
• Using p namespace reduces the amount of XML required in Spring configuration

In order to use p-namespace follow the following steps:

1. In the configuration xml file, add "p" namespace URI like `"xmlns:p="http://www.springframework.org/schema/p"
2. For each property tag add an attribute p:<property-name>value and set the attribute value to it
3. If one of your property is expecting another bean , then you should suffix -ref to your property name

for ex:

<xmp>
<?xml version="1.0" encoding="UTF-8"?>
<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.xsd">

    <bean id="addr1" class="com.pfl.samples.spring.cpns.Address">
        <property name="houseNo" value="2106"/>
        <property name="street" value="Newbury St"/>
        <property name="city" value="Boston"/>
        <property name="zipCode" value="02115-2703"/>
    </bean>

    <bean id="constArgAnotherBean" class="com.pfl.samples.spring.cpns.Person">
        <property name="firstName" value="Joe"/>
        <property name="lastName" value="John"/>
        <property name="age" value="35"/>
        <property name="address" ref="addr1"/>
    </bean>

</beans> 
</xmp>

So using p-namespace we can write like this :

<xmp>
<?xml version="1.0" encoding="UTF-8"?>
<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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean name="addr1" class="com.pfl.samples.spring.cpns.Address"
        p:houseNo="2106" p:street="Newbury St"
        p:city="Boston" p:zipCode="02115-2703"/>
    <bean name="person1" class="com.pfl.samples.spring.cpns.Person"
        p:firstName="Joe" p:lastName="John"
        p:age="35" p:address-ref="addr1"/>

</beans>
</xmp>