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From "Chris A. Mattmann (JIRA)" <>
Subject [jira] Commented: (NUTCH-574) Including inlink anchor text in index can create irrelevant search results.
Date Wed, 07 Nov 2007 20:24:50 GMT


Chris A. Mattmann commented on NUTCH-574:

IMHO what Dennis suggest is fine so long as it's a configurable option, that doesn't change
the default behavior of the system. That is to say, if Dennis wants to make it something that
you can turn on or off in the nutch-default.xml file, and then commit the default to off (e.g.,
the way Nutch behaves now), and then in his own local environment, simply set it to "on" and
maintain that conf file locally, then it's probably something that we should think about,
since it seems to support a use case that Dennis is having and we don't want to shut anyone's
use case out -- if it can be supported with a configurable option.

My +1 for the patch so long as the default doesn't change Nutch's existing behavior.

> Including inlink anchor text in index can create irrelevant search results.
> ---------------------------------------------------------------------------
>                 Key: NUTCH-574
>                 URL:
>             Project: Nutch
>          Issue Type: Bug
>          Components: indexer
>         Environment: All, basic indexing filter
>            Reporter: Dennis Kubes
>            Assignee: Dennis Kubes
>             Fix For: 1.0.0
>         Attachments: NUTCH-574-1.patch
> Currently the basic indexing filter includes inbound anchor text for a given URL in the
index.  This sometimes allows pages to show up in search results where they may not be relevant.
 An example of this is a search for "dallas hotels" in our production index (
 Google would show up first in this example although there is no text matching either dallas
or hotels on the google home page.  What is happening here is there are inlinks into google
with the words dallas and hotels which get included in the index for and because
google would have a very high boost due to inlinks, google shows up first for these search
terms.  I propose we add an option to allow/prevent inlink anchor text from being included
in the index and set the default for this option to NOT include inbound link anchor text.

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