public class TextProfileSignature extends MD5Signature
This implementation is copied from Apache Nutch.
An implementation of a page signature. It calculates an MD5 hash of a plain text "profile" of a page.
The algorithm to calculate a page "profile" takes the plain text version of a page and performs the following steps:
QUANT = QUANT_RATE * maxFreq, where
QUANT_RATEis 0.01f by default, and
maxFreqis the maximum token frequency). If
maxFreqis higher than 1, then QUANT is always higher than 2 (which means that tokens with frequency 1 are always discarded).
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