analyzer index vs query vs {missing}

[Norberto Meijome]

hi there,
when defining a field type, i understand the meaning of 'analyzer type="index"' 
, or type="query". What does it mean when the type is missing? does it apply at 
both index and query ?
This can be found in the example's schema.xml :

    <!--
     Setup simple analysis for spell checking
     -->
    <fieldType name="textSpell" class="solr.TextField" 
positionIncrementGap="100" >
      <analyzer>
        <tokenizer class="solr.StandardTokenizerFactory"/>
        <filter class="solr.LowerCaseFilterFactory"/>
        <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
      </analyzer>
    </fieldType>


thanks!
B

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