package edu.northwestern.at.utils.corpuslinguistics.postagger;

/*	Please see the license information at the end of this file. */

import java.util.*;

import edu.northwestern.at.utils.corpuslinguistics.adornedword.*;
import edu.northwestern.at.utils.corpuslinguistics.lexicon.*;
import edu.northwestern.at.utils.corpuslinguistics.tokenizer.*;

/**	Interface for a Part of Speech retagger.
 *
 *	<p>
 *	A retagger takes the output of another tagger and retags the words.
 *	Normally this is used to apply fixup rules to the output of a
 *	statistical tagger.
 *	</p>
 */

public interface PartOfSpeechRetagger extends PartOfSpeechTagger
{
	/**	Retag a sentence.
	 *
	 *	@param	sentence	The sentence as an
	 *						{@link edu.northwestern.at.utils.corpuslinguistics.adornedword.AdornedWord} .
	 *
	 *	@return				The sentence with words retagged.
	 */

	public<T extends AdornedWord> List<T> retagSentence
	(
		List<T> sentence
	);

	/**	Can retagger add or delete words in the original sentence?
	 *
	 *	@return		true if retagger can add or delete words.
	 */

	public boolean canAddOrDeleteWords();
}

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