If you have more than two levels, how about using ajax to dynamic loading sub-level?<div><br></div><div>Cheers, Eric</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Nov 30, 2012 at 6:07 AM, Hummel, Tracey S - (thummel) <span dir="ltr">&lt;<a href="mailto:thummel@email.arizona.edu" target="_blank">thummel@email.arizona.edu</a>&gt;</span> wrote:<br>
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<div style="direction:ltr;font-size:10pt;font-family:Tahoma">You might want to try the awesome Hierarchical Select:<br>
<a href="http://drupal.org/project/hierarchical_select" target="_blank">http://drupal.org/project/hierarchical_select</a>
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<div>Check out this demonstration:  <a href="http://wimleers.com/demo/hierarchical-select/taxonomy" target="_blank">http://wimleers.com/demo/hierarchical-select/taxonomy</a><br>
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<div>This module is not yet quite working in d7 Views as an exposed filter but there has been a work around module that was posted:   <span style="vertical-align:baseline;line-height:20px;font-size:12px;font-family:&#39;Lucida Grande&#39;,&#39;Lucida Sans Unicode&#39;,sans-serif;margin:0px;border:0px;padding:0px">V</span><span style="vertical-align:baseline;line-height:20px;font-size:12px;font-family:&#39;Lucida Grande&#39;,&#39;Lucida Sans Unicode&#39;,sans-serif;margin:0px;border:0px;padding:0px">iews
 Hierarchical Taxonomy Filter</span></div>
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<div><font face="Lucida Grande, Lucida Sans Unicode, sans-serif"><span style="font-size:12px;line-height:20px">Tracey</span></font></div>
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<div style="font-family:Tahoma;font-size:13px"><font style="font-family:Arial"><span style="font-size:10pt">--------------------</span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt">Tracey Hummel<br>
<span style="font-size:10pt"><em>Web Application Developer</em></span></span></font></div>
<div style="font-family:Tahoma;font-size:13px"><font style="font-family:Arial"><span style="font-size:10pt">University of Arizona<br>
Social &amp; Behavioral Sciences Technical Services</span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt">University Services Building,
</span></font><font style="font-family:Arial"><span style="font-size:10pt">888 N. Euclid, Room 302</span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt">PO Box 210158, Tucson AZ  85721-0158</span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt"><a href="tel:520-626-3223" value="+15206263223" target="_blank">520-626-3223</a></span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt"><a href="mailto:tracey@arizona.edu" target="_blank">tracey@arizona.edu</a></span></font><br>
<font style="font-family:Arial"><span style="font-size:10pt"><a href="http://tshummel.com" target="_blank">http://tshummel.com</a></span></font></div>
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<div style="direction:ltr"><font face="Tahoma" color="#000000"><b>From:</b> <a href="mailto:support-bounces@drupal.org" target="_blank">support-bounces@drupal.org</a> [<a href="mailto:support-bounces@drupal.org" target="_blank">support-bounces@drupal.org</a>] on behalf of Chris Miller [<a href="mailto:cjm@tryx.org" target="_blank">cjm@tryx.org</a>]<br>

<b>Sent:</b> Thursday, November 29, 2012 11:47 AM<br>
<b>To:</b> <a href="mailto:support@drupal.org" target="_blank">support@drupal.org</a><br>
<b>Subject:</b> [support] Master Detail relationships<br>
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<div>Hi Folks,</div>
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<div>I need to express a tree of data with &quot;drill down&quot;.  I start with a view that collects all the top level content as links to the next level deep and there is where I stumble.  I don&#39;t know how to express this second level such that it can be addressed
 by the links in the top level, and I don&#39;t know how to express the link in the top level.</div>
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<div>Any help?</div>
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<div>Chris.</div>
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