title: I have an error in pom.xml file
body: <p>I got an error that is shown in picture <a href="https://i.stack.imgur.com/HpTac.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HpTac.png" alt="when i added this code it gives me a error the image show that what is the error ?"></a></p>
  
  <p>you can see error in the picture that i given this error comes at line where i write a packaging tag when i remove this tag then error come at this point (<a href="http://maven.apache.org/maven-v4_0_0.xsd" rel="nofollow noreferrer">http://maven.apache.org/maven-v4_0_0.xsd</a>)
  here is my pom.xml file</p>
  
  <pre><code>&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/maven-v4_0_0.xsd"&gt;
  &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
  
  &lt;groupId&gt;com.github.haifengl&lt;/groupId&gt;
  &lt;packaging&gt;jar&lt;/packaging&gt;
  
  &lt;artifactId&gt;smile-plot&lt;/artifactId&gt;
  &lt;version&gt;1.1.0&lt;/version&gt;
  
  &lt;name&gt;Smile Plot&lt;/name&gt;
  &lt;description&gt;Statistical Machine Intelligence and Learning Engine -- Plot&lt;/description&gt;
  &lt;url&gt;http://github.com/haifengl/smile&lt;/url&gt;
  
  &lt;licenses&gt;
      &lt;license&gt;
          &lt;name&gt;Apache License, Version 2.0&lt;/name&gt;
          &lt;url&gt;http://www.apache.org/licenses/LICENSE-2.0.txt&lt;/url&gt;
          &lt;distribution&gt;repo&lt;/distribution&gt;
      &lt;/license&gt;
  &lt;/licenses&gt;
  
  &lt;developers&gt;
      &lt;developer&gt;
          &lt;name&gt;Haifeng Li&lt;/name&gt;
          &lt;email&gt;haifeng.hli@gmail.com&lt;/email&gt;
          &lt;url&gt;http://haifengl.wordpress.com&lt;/url&gt;
          &lt;roles&gt;
              &lt;role&gt;architect&lt;/role&gt;
              &lt;role&gt;developer&lt;/role&gt;
          &lt;/roles&gt;
          &lt;timezone&gt;America/New_York&lt;/timezone&gt;
          &lt;properties&gt;
              &lt;twitter&gt;@haifengl&lt;/twitter&gt;
          &lt;/properties&gt;
      &lt;/developer&gt;
  &lt;/developers&gt;
  
  &lt;scm&gt;
      &lt;connection&gt;scm:git:git@github.com:haifengl/smile.git&lt;/connection&gt;
      &lt;developerConnection&gt;scm:git:git@github.com:haifengl/smile.git&lt;/developerConnection&gt;
      &lt;url&gt;git@github.com:haifengl/smile.git&lt;/url&gt;
  &lt;/scm&gt;
  
  &lt;properties&gt;
      &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
  &lt;/properties&gt;
  
  &lt;dependencies&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;com.github.haifengl&lt;/groupId&gt;
          &lt;artifactId&gt;smile-math&lt;/artifactId&gt;
          &lt;version&gt;1.0.2&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;com.github.haifengl&lt;/groupId&gt;
          &lt;artifactId&gt;smile-core&lt;/artifactId&gt;
          &lt;version&gt;1.0.2&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.swinglabs&lt;/groupId&gt;
          &lt;artifactId&gt;swingx&lt;/artifactId&gt;
          &lt;version&gt;1.6.1&lt;/version&gt;
      &lt;/dependency&gt;
  
  &lt;/dependencies&gt;
  
  &lt;distributionManagement&gt;
      &lt;snapshotRepository&gt;
          &lt;id&gt;ossrh&lt;/id&gt;
          &lt;url&gt;https://oss.sonatype.org/content/repositories/snapshots&lt;/url&gt;
      &lt;/snapshotRepository&gt;
      &lt;repository&gt;
          &lt;id&gt;ossrh&lt;/id&gt;
          &lt;url&gt;https://oss.sonatype.org/service/local/staging/deploy/maven2/&lt;/url&gt;
      &lt;/repository&gt;
  &lt;/distributionManagement&gt;
  
  &lt;profiles&gt;
      &lt;profile&gt;
          &lt;id&gt;doclint-java8-disable&lt;/id&gt;
  
          &lt;activation&gt;
              &lt;jdk&gt;[1.8,)&lt;/jdk&gt;
          &lt;/activation&gt;
  
          &lt;build&gt;
              &lt;plugins&gt;
                  &lt;plugin&gt;
                      &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
                      &lt;artifactId&gt;maven-javadoc-plugin&lt;/artifactId&gt;
                      &lt;version&gt;2.10.3&lt;/version&gt;
                      &lt;configuration&gt;
                          &lt;additionalparam&gt;-Xdoclint:none&lt;/additionalparam&gt;
                      &lt;/configuration&gt;
                  &lt;/plugin&gt;
              &lt;/plugins&gt;
          &lt;/build&gt;
      &lt;/profile&gt;
  &lt;/profiles&gt;
  
  &lt;build&gt;
      &lt;plugins&gt;
          &lt;plugin&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
              &lt;version&gt;3.3&lt;/version&gt;
              &lt;configuration&gt;
                  &lt;source&gt;1.7&lt;/source&gt;
                  &lt;target&gt;1.7&lt;/target&gt;
              &lt;/configuration&gt;
          &lt;/plugin&gt;
          &lt;plugin&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-source-plugin&lt;/artifactId&gt;
              &lt;version&gt;2.4&lt;/version&gt;
              &lt;executions&gt;
                  &lt;execution&gt;
                      &lt;id&gt;attach-sources&lt;/id&gt;
                      &lt;goals&gt;
                          &lt;goal&gt;jar-no-fork&lt;/goal&gt;
                      &lt;/goals&gt;
                  &lt;/execution&gt;
              &lt;/executions&gt;
          &lt;/plugin&gt;
          &lt;plugin&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-javadoc-plugin&lt;/artifactId&gt;
              &lt;version&gt;2.10.3&lt;/version&gt;
              &lt;configuration&gt;
                  &lt;additionalparam&gt;-Xdoclint:none&lt;/additionalparam&gt;
              &lt;/configuration&gt;
              &lt;executions&gt;
                  &lt;execution&gt;
                      &lt;id&gt;attach-javadocs&lt;/id&gt;
                      &lt;goals&gt;
                          &lt;goal&gt;jar&lt;/goal&gt;
                      &lt;/goals&gt;
                  &lt;/execution&gt;
              &lt;/executions&gt;
          &lt;/plugin&gt;
          &lt;plugin&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-gpg-plugin&lt;/artifactId&gt;
              &lt;version&gt;1.6&lt;/version&gt;
              &lt;executions&gt;
                  &lt;execution&gt;
                      &lt;id&gt;sign-artifacts&lt;/id&gt;
                      &lt;phase&gt;verify&lt;/phase&gt;
                      &lt;goals&gt;
                          &lt;goal&gt;sign&lt;/goal&gt;
                      &lt;/goals&gt;
                  &lt;/execution&gt;
              &lt;/executions&gt;
          &lt;/plugin&gt;
          &lt;plugin&gt;
              &lt;groupId&gt;org.sonatype.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;nexus-staging-maven-plugin&lt;/artifactId&gt;
              &lt;version&gt;1.6.3&lt;/version&gt;
              &lt;extensions&gt;true&lt;/extensions&gt;
              &lt;configuration&gt;
                  &lt;serverId&gt;ossrh&lt;/serverId&gt;
                  &lt;nexusUrl&gt;https://oss.sonatype.org/&lt;/nexusUrl&gt;
                  &lt;autoReleaseAfterClose&gt;true&lt;/autoReleaseAfterClose&gt;
              &lt;/configuration&gt;
          &lt;/plugin&gt;
      &lt;/plugins&gt;
  &lt;/build&gt;
  </code></pre>
  
  <p></p>