clustering in solr(carrot2)

[Mugeesh Husain]

Hello everyone, 

For clustering I tried to implement some test using official document
https://cwiki.apache.org/confluence/display/solr/Result+Clustering. 

I am getting the result as below 
<arr name="clusters">
    <lst>
      <arr name="labels">
        <str>DDR</str>
      </arr>
      <double name="score">3.9599865057283354</double>
      <arr name="docs">
        <str>TWINX2048-3200PRO</str>
        <str>VS1GB400C3</str>
        <str>VDBDB1A16</str>
      </arr>
    </lst>
    <lst>
      <arr name="labels">
        <str>iPod</str>
      </arr>
      <double name="score">11.959228467119022</double>
      <arr name="docs">
        <str>F8V7067-APL-KIT</str>
        <str>IW-02</str>
        <str>MA147LL/A</str>
      </arr>
    </lst>


could anyone tell me what is lable tag( <arr
name="labels"><str>DDR</str></arr>) , where is coming from ? 

I am stuck over label tag, need to understand about label ? 

Please explain it or give me suitable link 


Thanks 
mugeesh 




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