public class TextProfileSignature extends Signature
An implementation of a page signature. It calculates an MD5 hash of a plain
text "profile" of a page. In case there is no text, it calculates a hash
using the MD5Signature
.
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_RATE
is
0.01f by default, and maxFreq
is the maximum token frequency).
If maxFreq
is higher than 1, then QUANT is always higher than 2
(which means that tokens with frequency 1 are always discarded).Copyright © 2015 The Apache Software Foundation