Regular Plugin parameters are not working

[Morgovsky, Alexander \(US - Glen Mills\)]

I have a short pom.xml.

<project>
        <artifactId>a</artifactId>
        <groupId>a<groupId>
        <version>1.0</version>
        <build>
                <plugins>
                        <plugin>
                                <artifactId>b</artifactId>
                                <groupId>b</groupId>
                                <version>2.0</version>
                                ...
                                <configuration>
        
<my_artifact_id>${project.artifactId}</my_artifact_id>
        
<my_group_id>${project.groupId}</my_group_id>
                                </configuration>
                                ...
                        </plugin>
                </plugins>
        </build>
</project>

For some reason, the variables my_artifact_id and my_group_id are
getting resolved by the plugin b-b-2.0 as null, so they are not being
resolved correctly according to the configured values.  I cannot see why
what I am doing is wrong.  May someone please tell me what is happening?
Thanks. 


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