I am not able to add name space prefixes to pom.xml

consider following pom.xml, I am not able to run package goal on this pom.xml

<?xml version="1.0" encoding="UTF-8" ?>
<abc:project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:abc="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<groupId>mavenproj</groupId>
<artifactId>mavenproj</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
</plugin>
</plugins>
</build>
<parent>
<groupId>AppPOM</groupId>
<artifactId>AppPOM</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
</abc:project>