title: What is the third parameter to Text::JaroWinkler::strcmp95 for?
body: <p>I am interested in the Jaro-Winkler module written in Perl to compute the distance (or similarity) between two strings:</p>
  
  <p><a href="http://search.cpan.org/~scw/Text-JaroWinkler-0.1/JaroWinkler.pm" rel="nofollow">http://search.cpan.org/~scw/Text-JaroWinkler-0.1/JaroWinkler.pm</a></p>
  
  <p>The syntax of the function is not clear to me; I could not find any clear documentation of it.</p>
  
  <p>Here is the sample code:</p>
  
  <pre><code>#!/usr/bin/perl
  
  use 5.10.0;
  use Text::JaroWinkler qw( strcmp95 );
  print strcmp95("it is a dog","i am a dog.",11);
  </code></pre>
  
  <p>What exactly does the 11 represent?  I gather it is a length.  Which length?  The length of the amount of characters I want checked?  Is it required to be there?  </p>