title: How to remove UIMA annotations?
body: <p>I'm using some UIMA annotators in a pipeline. It run tasks like: </p>
  
  <ul>
  <li>tokenizer </li>
  <li>sentence splitter</li>
  <li>gazetizer</li>
  <li><strong>My Annotator</strong> </li>
  </ul>
  
  <p>The problem is that I don't want to write ALL the annotations (Token, Sentence, SubToken, Time, myAnnotations, etc..) to the disk because the files gets very large quicky. </p>
  
  <p>I want to remove all the annotations and keep only the created by <strong>My Annotator</strong>.</p>
  
  <p>I'm working with the next libraries:</p>
  
  <ol>
  <li>uimaFIT 2.0.0</li>
  <li>ClearTK 1.4.1</li>
  <li>Maven</li>
  </ol>
  
  <p>And I'm using a <code>org.apache.uima.fit.pipeline.SimplePipeline</code> with:</p>
  
  <pre><code>SimplePipeline.runPipeline(
      UriCollectionReader.getCollectionReaderFromDirectory(filesDirectory), //directory with text files
      UriToDocumentTextAnnotator.getDescription(),
      StanfordCoreNLPAnnotator.getDescription(),//stanford tokenize, ssplit, pos, lemma, ner, parse, dcoref
      AnalysisEngineFactory.createEngineDescription(//
          XWriter.class, 
          XWriter.PARAM_OUTPUT_DIRECTORY_NAME, outputDirectory,
          XWriter.PARAM_FILE_NAMER_CLASS_NAME, ViewURIFileNamer.class.getName())
  );
  </code></pre>
  
  <p>What I'm trying to do is to use the Standford NLP annotator(from ClearTK) and remove the useless annotation.</p>
  
  <p>How do I do this?</p>
  
  <p>From what I know, you can use the <code>removeFromIndexes();</code> method from with an Annotation instance.</p>
  
  <p>Do I need to create an UIMA processor and add it to my pipeline?</p>