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    <p>You can do this with <code>XmlSlurper</code>:</p> <pre><code>import groovy.xml.* def pxml = '''&lt;project&gt; | &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; | &lt;groupId&gt;com.group&lt;/groupId&gt; | &lt;artifactId&gt;artifact&lt;/artifactId&gt; | &lt;version&gt;1.4&lt;/version&gt; | &lt;dependencyManagement&gt; | &lt;dependencies&gt; | &lt;dependency&gt; | &lt;groupId&gt;junit&lt;/groupId&gt; | &lt;artifactId&gt;junit&lt;/artifactId&gt; | &lt;version&gt;4.8.2&lt;/version&gt; | &lt;scope&gt;test&lt;/scope&gt; | &lt;/dependency&gt; | &lt;/dependencies&gt; | &lt;/dependencyManagement&gt; |&lt;/project&gt;'''.stripMargin() def p = new XmlSlurper().parseText( pxml ) String nxml = new StreamingMarkupBuilder().bind { project { dependecyManagement { dependencies { mkp.yield p.dependencyManagement.dependencies.children() } } } } println XmlUtil.serialize( nxml ) </code></pre> <p>Which prints:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;project&gt; &lt;dependecyManagement&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;junit&lt;/groupId&gt; &lt;artifactId&gt;junit&lt;/artifactId&gt; &lt;version&gt;4.8.2&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;/dependecyManagement&gt; &lt;/project&gt; </code></pre> <p>To handle the namespaces better, you could try:</p> <pre><code>def pxml = '''&lt;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"&gt; | &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; | &lt;groupId&gt;com.group&lt;/groupId&gt; | &lt;artifactId&gt;artifact&lt;/artifactId&gt; | &lt;version&gt;1.4&lt;/version&gt; | &lt;dependencyManagement&gt; | &lt;dependencies&gt; | &lt;dependency&gt; | &lt;groupId&gt;junit&lt;/groupId&gt; | &lt;artifactId&gt;junit&lt;/artifactId&gt; | &lt;version&gt;4.8.2&lt;/version&gt; | &lt;scope&gt;test&lt;/scope&gt; | &lt;/dependency&gt; | &lt;/dependencies&gt; | &lt;/dependencyManagement&gt; |&lt;/project&gt;'''.stripMargin() def p = new XmlSlurper().parseText( pxml ) String nxml = new StreamingMarkupBuilder().bind { mkp.declareNamespace( '':"http://maven.apache.org/POM/4.0.0", 'xsi':"http://www.w3.org/2001/XMLSchema-instance" ) project( 'xsi:schemaLocation':p.@schemaLocation ) { dependecyManagement { dependencies { mkp.yield p.dependencyManagement.dependencies.children() } } } } println XmlUtil.serialize( nxml ) </code></pre> <p>Which should give you:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;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"&gt; &lt;dependecyManagement&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;junit&lt;/groupId&gt; &lt;artifactId&gt;junit&lt;/artifactId&gt; &lt;version&gt;4.8.2&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;/dependecyManagement&gt; &lt;/project&gt; </code></pre>
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