title: Solr query syntax for array field
body: <p>How do I search within an array field?</p>
  
  <p>I am using solr 4.2 with default settings.
  I indexed a few html and pdf documents using SolrNet. Here is a sample result for such a document when I search using the admin search <code>*:*</code></p>
  
  <pre><code>enter code here
  &lt;doc&gt;
  &lt;str name="id"&gt;2&lt;/str&gt;
  &lt;date name="last_modified"&gt;2011-12-19T17:33:25Z&lt;/date&gt;
  &lt;str name="author"&gt;name&lt;/str&gt;
  &lt;str name="author_s"&gt;name&lt;/str&gt;
  &lt;arr name="title"&gt;
    &lt;str&gt;CALIFORNIA CODES&lt;/str&gt;
  &lt;/arr&gt;
  &lt;arr name="content_type"&gt;
    &lt;str&gt;application/pdf&lt;/str&gt;
  &lt;/arr&gt;
  &lt;str name="resourcename"&gt;T01041.pdf&lt;/str&gt;
  &lt;arr name="content"&gt;
    &lt;str&gt; PDF text here &lt;/str&gt;
  &lt;/arr&gt;
  &lt;long name="_version_"&gt;1431314431195742208&lt;/long&gt;
  &lt;/doc&gt;
  </code></pre>
  
  <p>The search using <code>content:*</code> returns 0 results.</p>