What should be the correct check for any XML to be POM?

[amaresh mourya]

Hi all,
I am need of writing a check method to filter POMs from a list of xml files.
What should be the exact check?
Only the <project> tag along with Namespace is sufficient or I need to check
for all three xmlns, xmlns :xsi and xsi:schemaLocation?

<project xmlns="http://maven.apache.org/POM/4.0.0";
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                      http://maven.apache.org/xsd/maven-4.0.0.xsd";>


Another related question is : Consider a case of multi-module application
pom, where in each module's directory there are more than one xml files, So
is it possible that for this module there can be two POMs ? or only one.?

 There are two xml files attached, that have the same artifactId
"common-artifact", what check would return me correct POM for this artifact.
1. bak_pom.xml
2. pom.xml

Thanks
--amaresh

<project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";>
  <parent>
    <groupId>OER-Common</groupId>
    <artifactId>OER-Common</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <modelVersion>4.0.0</modelVersion>
  <groupId>OER-Common</groupId>
  <artifactId>common.artifact</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>common.artifact</name>
  <dependencies>
  	<dependency>
  		<groupId>OER-Common</groupId>
  		<artifactId>common.web</artifactId>
  		<version>0.0.1-SNAPSHOT</version>
  	</dependency>
  	<dependency>
  		<groupId>OER-Common</groupId>
  		<artifactId>common.util</artifactId>
  		<version>0.0.1-SNAPSHOT</version>
  		<classifier>tests</classifier>
  		<scope>test</scope>
  	</dependency>
   </dependencies>
</project>


<?xml version="1.0" encoding="US-ASCII" ?>
<project xmlns="http://maven.apache.org/POM/4.0.0";>
  <modelVersion>4.0.0</modelVersion>
  <groupId>common.artifact</groupId>
  <artifactId>common.artifact</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <build>
    <sourceDirectory>src/main/java/</sourceDirectory>
    <outputDirectory>target/</outputDirectory>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.0.2</version>
        <configuration>
          <source>
            1.6
          </source>
          <target>
            1.6
          </target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

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