enhancement-engines/topic/engine/src/main/resources/default-topic-trainingset/conf/schema.xml

<?xml version="1.0" encoding="UTF-8" ?>
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 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
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 See the License for the specific language governing permissions and
 limitations under the License.
-->
<schema name="example" version="1.3">
  <types>
    <fieldType name="string" class="solr.StrField" sortMissingLast="true"
      omitNorms="true"/>

    <fieldType name="int" class="solr.TrieIntField" precisionStep="0"
      omitNorms="true" positionIncrementGap="0"/>

    <fieldType name="tdate" class="solr.TrieDateField" omitNorms="true"
      precisionStep="6" positionIncrementGap="0"/>

    <fieldType name="random" class="solr.RandomSortField" indexed="true" />

    <fieldType name="text" class="solr.TextField">
      <analyzer type="index">
        <tokenizer class="solr.StandardTokenizerFactory"/>
<!--         <filter class="solr.StopFilterFactory" ignoreCase="true" -->
<!--           words="stopwords_en.txt" enablePositionIncrements="false" /> -->
        <filter class="solr.LowerCaseFilterFactory"/>
        <!-- The use of Shingle might help improve the quality but they increase
        the size of the index far too much. It would be better to use a
        collocation bloom filter to mitigate this effect:
        http://issues.apache.org/jira/browse/MAHOUT-415

        <filter class="solr.ShingleFilterFactory" maxShingleSize="2"
          outputUnigrams="true"/>
         -->
      </analyzer>
      <analyzer type="query">
        <tokenizer class="solr.StandardTokenizerFactory"/>
<!--         <filter class="solr.StopFilterFactory" ignoreCase="true" -->
<!--           words="stopwords_en.txt" enablePositionIncrements="false" /> -->
<!--         <filter class="solr.SynonymFilterFactory" -->
<!--           synonyms="synonyms.txt" ignoreCase="true" expand="true"/> -->
        <filter class="solr.LowerCaseFilterFactory"/>
        <!--
        <filter class="solr.ShingleFilterFactory" maxShingleSize="2"
          outputUnigrams="true"/>
         -->
      </analyzer>
    </fieldType>

 </types>

 <fields>
   <field name="id" type="string" indexed="true" stored="true" required="true" />
   <field name="topics" type="string" indexed="true" stored="true" multiValued="true" /> 
   <field name="text" type="text" indexed="true" stored="true"
     termVectors="true" termPositions="false" termOffsets="false" />
   <field name="modification_dt" type="tdate" indexed="true" stored="true" />
   <field name="random" type="random" indexed="true" stored="false" />
 </fields>

 <uniqueKey>id</uniqueKey>
 <defaultSearchField>text</defaultSearchField>
 <solrQueryParser defaultOperator="AND"/>
</schema>