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    copied!<p>On my project, I have such a problem. To reduce the number of versions I define in my parent pom.xml some properties, which correspond to the versions of each module:</p> <pre><code>&lt;properties&gt; &lt;project-version&gt;1.0.0&lt;/project-version&gt; &lt;!-- Same version than the parent for the module 'commons' --&gt; &lt;project-commons-version&gt;${project-version}&lt;/project-commons-version&gt; &lt;!-- A specific version for the 'business' module --&gt; &lt;project-business-version&gt;1.0.1&lt;/project-business-version&gt; ... </code></pre> <p>And then, in the pom.xml of each module, I use these properties. The problem is that I must clearly input the version of the parent in this pom.xml. For example, in my business pom.xml, I have:</p> <pre><code>&lt;project&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;!-- I must indicate the version of the parent --&gt; &lt;parent&gt; &lt;groupId&gt;my.project&lt;/groupId&gt; &lt;artifactId&gt;parent&lt;/artifactId&gt; &lt;version&gt;1.0.0&lt;/version&gt; &lt;/parent&gt; ... &lt;dependencies&gt; &lt;!-- However, in my dependencies, I use directly the properties defined in the parent's pom.xml --&gt; &lt;dependency&gt; &lt;groupId&gt;my.project&lt;/groupId&gt; &lt;artifactId&gt;project-persistence&lt;/artifactId&gt; &lt;version&gt;${project-persistence-version}&lt;/version&gt; &lt;/dependency&gt; </code></pre> <p>However, I really suggest that you have a look to the <a href="http://maven.apache.org/plugins/maven-release-plugin/" rel="nofollow noreferrer">release plugin</a> that will take care of modifying all the version numbers for you.</p>
 

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