src/it/projects/MJAVADOC-767/pom.xml

<?xml version="1.0" encoding="UTF-8"?>
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<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.apache.maven.plugins.javadoc.it</groupId>
    <artifactId>mjavadoc767</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>

    <url>https://issues.apache.org/jira/browse/MJAVADOC-767</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>9</maven.compiler.source>
        <maven.compiler.target>9</maven.compiler.target>
    </properties>

    <modules>
        <module>thing1</module>
        <module>thing2</module>
        <module>doc</module>
    </modules>
</project>