title: Solr Index multiple values AS one field
body: <p>I want to do queries on double fields where four values are actually grouped and each document can have multiple instances of this. So what I need is a field where I can store something like this</p>
  
  <pre><code>&lt;doc&gt;
     &lt;field name="id"&gt;id&lt;/field&gt;
     &lt;field name="valueGroup"&gt;1 2 3 4&lt;/field&gt;
     &lt;field name="valueGroup"&gt;5 6 7 8&lt;/field&gt;
  &lt;/doc&gt;
  </code></pre>
  
  <p>And then do ranged queries in this way: valueGroup: [0,0,0,0 to 3,8,8,8]. I cannot Index this as single fields with multivalued="true" because each group needs to be treated separately. I know there is a fieldtype LatLon but that has only two values. How to get fields with more than 2 dimensions? </p>