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https://issues.apache.org/jira/browse/NUTCH-655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797013#action_12797013
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Andrzej Bialecki  commented on NUTCH-655:
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I'm not sure about the latest addition (the score option). If we go this route, 
then I suggest doing the last minor step and recognize reserved metadata keys 
to do also other useful things like setting fetch interval. I.e. define and 
recognize "nutch.score" and "nutch.fetchInterval", and document it properly 
somewhere ...(wiki? javadoc? cmd-line synopsis?).

> Injecting Crawl metadata
> ------------------------
>
>                 Key: NUTCH-655
>                 URL: https://issues.apache.org/jira/browse/NUTCH-655
>             Project: Nutch
>          Issue Type: Improvement
>          Components: injector
>            Reporter: Julien Nioche
>            Assignee: Julien Nioche
>            Priority: Minor
>             Fix For: 1.1
>
>         Attachments: Injector.patch, NUTCH-655.v2
>
>
> the patch attached allows to inject metadata into the crawlDB. The input file 
> has to contain fields separated by tabs, with the URL being on the first 
> column. The metadata names and values are separated by '='. A input line 
> might look like this:
> http://www.myurl.com  \t  categ=value1 \t categ2=value2
> This functionality can be useful to store external knowledge and index it 
> with a custom plugin

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