[Solr Wiki] Update of "DataImportHandler" by NoblePaul

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The following page has been changed by NoblePaul:
http://wiki.apache.org/solr/DataImportHandler

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   * Use delta-import command to do a delta import (get new inserts/updates) and add to SOLR index
  
  == Configuring DataSources ==
- Add the tag 'dataSource' directly uner the 'dataConfig' tag.
+ Add the tag 'dataSource' directly under the 'dataConfig' tag.
  {{{
  <dataSource type="JdbcDataSource" driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost/dbname" user="db_username" password="db_password"/>
  }}}
@@ -110, +110 @@

   * '''`parentDeltaQuery`''' : Only used in delta-import
   * '''`deletedPkQuery`''' : Only used in delta-import
  
+ 
+ == Commands ==
  [[Anchor(commands)]]
- == Commands == 
  The handler exposes all its API as http requests . The following are the possible operations
  
   * '''full-import''' : Full Import operation can be started by hitting the URL `http://<host>:<port>/solr/dataimport?command=full-import`