title: how to find org.eclipse.persistence maven dependency?
body: <p>how to find a maven dependency ? for example,</p>
  
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;org.eclipse.persistence&lt;/groupId&gt;
      &lt;artifactId&gt;javax.persistence&lt;/artifactId&gt;
      &lt;version&gt;2.0.0&lt;/version&gt;
  &lt;/dependency&gt;
  </code></pre>
  
  <p>The error is </p>
  
  <pre><code>[WARNING] The POM for org.eclipse.persistence:javax.persistence:jar:2.0.0 is missing, no dependency information available
  [WARNING] The POM for org.eclipse.persistence:eclipselink:jar:2.0.0 is missing, no dependency information available
  [ERROR] Failed to execute goal on project javaee: Could not resolve dependencies for project com:javaee:jar:2.0: The following artifacts could not be resolved: org.ecli
      pse.persistence:javax.persistence:jar:2.0.0, org.eclipse.persistence:eclipselink:jar:2.0.0: Failure to find org.eclipse.persistence:javax.persistence:jar:2.0.0 in http:
      //repo1.maven.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -
      &gt; [Help 1]
  </code></pre>
  
  <p>Thanks.</p>