schema.xml

<?xml version="1.0" encoding="UTF-8" ?>
<schema name="document-2.0" version="1.5">
  ...
  <types>
    <fieldType name="text" class="solr.TextField" positionIncrementGap="100">
            <analyzer type="query">
                        <tokenizer class="solr.ICUTokenizerFactory" />
                        <filter class="solr.ICUFoldingFilterFactory" />
                <filter class="solr.HunspellStemFilterFactory" dictionary="de_DE_frami.dic" affix="de_DE_frami.aff" ignoreCase="true"/>
                <filter class="solr.WordDelimiterFilterFactory" stemEnglishPossessive="0"/>
                <filter class="solr.TrimFilterFactory" />
              </analyzer>
            <analyzer type="index">
                        <tokenizer class="solr.ICUTokenizerFactory" />
                        <filter class="solr.ICUFoldingFilterFactory" />
                <filter class="solr.HunspellStemFilterFactory" dictionary="de_DE_frami.dic" affix="de_DE_frami.aff" ignoreCase="true"/>
                <filter class="solr.WordDelimiterFilterFactory" stemEnglishPossessive="0"/>
                <filter class="solr.TrimFilterFactory" />
              </analyzer>
    </fieldType>
 </types>

 <fields>
   <field name="searchable_text" type="text" indexed="true"
          stored="false" required="false" multiValued="true"
          termVectors="false" termPositions="false"
          termOffsets="false" storeOffsetsWithPositions="true" />

   <field name="text" type="text" indexed="true"
          stored="true" required="false" multiValued="false"
          termVectors="false" termPositions="false"
          termOffsets="false" storeOffsetsWithPositions="true" />
 </fields>

 <copyField source="text" dest="searchable_text"/>
 ...
</schema>