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<chapter id="tools.coref">
<title>Coreference Resolution</title>
<para>
The OpenNLP Coreference Resolution system links multiple mentions of an
entity in a document together.
The OpenNLP implementation is currently limited to noun phrase mentions,
other mention types cannot be resolved.
</para>

<para>
TODO: Write more documentation about the coref component. Any contributions
are very welcome. If you want to contribute please contact us on the mailing list
or comment on the jira issue <ulink url="https://issues.apache.org/jira/browse/OPENNLP-48">OPENNLP-48</ulink>.
</para>
<!--
<section id="tools.coref.implementation">
	<title>Implementation</title>
	<para>The following section gives an overview of the implementation.
	The process is divided in two steps. First mention which can be linked
	are identified and in a second step a set of specialized resolvers links them together.
	</para>

	<section id="tools.coref.implementation.mention_finding">
	<title>Mention Finding</title>
	<para>
	</para>
	</section>

	<section id="tools.coref.implementation.linking">
	<title>Linking</title>
	<para>
Resolvers and linking:
The implementation has a dedicated model for different mention
categories.
These are:
Common Nouns
Definite Nouns
Plural Nouns
Plural Pronouns
Proper Nouns
Singular Pronouns
Speech Pronouns

- speak about 7 seven different models ...
- explain non referential thing
- speak about number, gender and similarity
- Speak about mention finding
	
	</para>
	</section>  
</section> --> 
</chapter>