Dismax Config?

[Matthew Runo]

I'd love to see some explanation of what's going on here, and how to  
configure it for my own use. I've changed the fields to match my own  
columns, but it'd be great if I could actually understand it..

    243   <requestHandler name="dismax"  
class="solr.DisMaxRequestHandler" >
    244     <lst name="defaults">
    245      <str name="echoParams">explicit</str>
    246      <float name="tie">0.01</float>
    247      <str name="qf">
    248         text^0.5 description^1.0 name^5.0 style_id^1.5  
product_id^10.0 brand^4.1 product_type^1.4
    249      </str>
    250      <str name="pf">
    251         text^0.2 description^1.1 name^1.5 brand^1.4  
brandexact^1.9
    252      </str>
    253      <str name="bf">
    254         ord(poplarity)^0.5 recip(rord(price),1,1000,1000)^0.3
    255      </str>
    256      <str name="fl">
    257         product_id,name,price,score
    258      </str>
    259      <str name="mm">
    260         2&lt;-1 5&lt;-2 6&lt;90%
    261      </str>
    262      <int name="ps">100</int>
    263     </lst>
    264   </requestHandler>
Thank you!

+--------------------------------------------------------+
 | Matthew Runo
 | Zappos Development
 | [EMAIL PROTECTED]
 | 702-943-7833
+--------------------------------------------------------+