HTML Scraper Plugin

  The HTML Scraper Plugin is meant to scrape any HTML page extracting human readable text only.
  Such plugin will generate a set of triples like:

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<http://source-page-url> <http://vocab.sindice.net/pagecontent/de>  "<DE  Extractor Result>" .
<http://source-page-url> <http://vocab.sindice.net/pagecontent/ae>  "<AE  Extractor Result>" .
<http://source-page-url> <http://vocab.sindice.net/pagecontent/lce> "<LCE Extractor Result>" .
<http://source-page-url> <http://vocab.sindice.net/pagecontent/ce>  "<CE  Extractor Result>" .
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  The plugin engine is based on the {{{http://code.google.com/p/boilerpipe/} Boilerpipe}} library extractor.
  The extractors mentioned as DE, AE, LCE and CE are the ones defined within the library.