index.xml

<IndexSet SetName="ukTownsIndexSet" IndexPath="~/App_Data/TEMP/ExamineIndexes/uktowns/">
	<IndexUserFields>
      	<add Name="name" EnableSorting="true"/>
      	<add Name="county" EnableSorting="true"/>
      	<add Name="country"/>
      	<add Name="grid_reference" />
      	<add Name="latitude" />
      	<add Name="longitude"/>
      	<add Name="postcode_sector"/>     
	</IndexUserFields>
</IndexSet>

----------------

<add name="TownIndexer"
    type="Examine.LuceneEngine.Providers.SimpleDataIndexer, Examine"
    indexSet="ukTownsIndexSet"
    dataService="SearchCourse.Core.Indexers.DbIndexer, SearchCourse.Core"
    analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net"
    indexTypes="ukTown"
    runAsync="true"/>

------------------------

<add name="TownSearcher"
    type="Examine.LuceneEngine.Providers.LuceneSearcher, Examine"
    indexSet="ukTownsIndexSet"
    analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net" />