title: Maven does not automatically download dependencies
body: <p>I'm a starter for Maven. I pulled a java maven project from Bitbucket. When compiling the prject Eclipse said "8/6/12 1:39:05 PM EST: Missing artifact com.tinkerpop.blueprints:blueprints-core:jar:1.0:compile":</p>
  
  <p>Maven console: </p>
  
  <pre><code>8/6/12 1:39:03 PM EST: Missing artifact com.tinkerpop.blueprints:blueprints-core:jar:1.0:compile
  8/6/12 1:39:05 PM EST: Missing artifact com.tinkerpop.blueprints:blueprints-core:jar:1.0:compile
  </code></pre>
  
  <p>but when I check the pom.xml file, it is already there in the dependency list, only the Type and Scope fields are empty. Seeing the errors, I try to add this dependency by myself. And it showed like this:
  <img src="https://i.stack.imgur.com/YE5X8.png" alt="enter image description here">
  The #1 question is, Why for 1.0 version, blueprints-core only have a .pom file not a .jar file? Does this mean in the remote repository they don't provide the 1.0 version any more? (I found the codes in the project reply on 1.0 version instead of 2.0 version of this Blueprint framework)</p>
  
  <p>The #2 questions is, under what circumstances Maven will not automatically download the jar files for the dependencies added?</p>
  
  <p>This is the original 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/xsd/maven-4.0.0.xsd"&gt;
      &lt;parent&gt;
          &lt;groupId&gt;edu.qut.cs&lt;/groupId&gt;
          &lt;artifactId&gt;qut-recommender&lt;/artifactId&gt;
          &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt;
          &lt;relativePath&gt;../qut-recommender/pom.xml&lt;/relativePath&gt;
      &lt;/parent&gt;
      &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
      &lt;artifactId&gt;rcmd-common&lt;/artifactId&gt;
      &lt;packaging&gt;jar&lt;/packaging&gt;
      &lt;name&gt;QUT Recommender Common Library and Utilty&lt;/name&gt;
  
      &lt;dependencies&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;com.google.guava&lt;/groupId&gt;
              &lt;artifactId&gt;guava&lt;/artifactId&gt;
              &lt;version&gt;11.0.1&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.mongodb&lt;/groupId&gt;
              &lt;artifactId&gt;mongo-java-driver&lt;/artifactId&gt;
              &lt;version&gt;2.7.2&lt;/version&gt;
              &lt;scope&gt;compile&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.apache.mahout&lt;/groupId&gt;
              &lt;artifactId&gt;mahout-ext&lt;/artifactId&gt;
              &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt;
              &lt;scope&gt;compile&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;jgrapht&lt;/groupId&gt;
              &lt;artifactId&gt;jgrapht&lt;/artifactId&gt;
              &lt;version&gt;0.7.3&lt;/version&gt;
              &lt;scope&gt;compile&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;com.tinkerpop.blueprints&lt;/groupId&gt;
              &lt;artifactId&gt;blueprints-core&lt;/artifactId&gt;
              &lt;version&gt;1.0&lt;/version&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;log4j&lt;/groupId&gt;
              &lt;artifactId&gt;log4j&lt;/artifactId&gt;
              &lt;version&gt;1.2.16&lt;/version&gt;
          &lt;/dependency&gt;   
      &lt;/dependencies&gt;
  
  &lt;/project&gt;
  </code></pre>
  
  <p>The POM and Jar files of 1.0 version exist. The following picture is the directories and files in the folder of "C:\Users\n8275441.m2\repository\com\tinkerpop\blueprints". BTW, I pulled this project from Bitbucket repository. Is it possible that those 1.0 version files came along with the project in Bitbuckdet?
  <img src="https://i.stack.imgur.com/I14fw.png" alt="enter image description here"></p>