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https://issues.apache.org/jira/browse/NUTCH-445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12476665
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Doug Cutting commented on NUTCH-445:
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Setting the boost to non-zero permits a "site:" query with no other terms, but
at the cost of inhibiting the conversion of the clause to a cached Lucene
filter, which can be a substantial optimization. I think it's better to leave
the boost as zero, and then (separately) fix the conversion-to-filter code to
not perform this optimization when no other query terms are present.
> Domain İndexing / Query Filter
> ------------------------------
>
> Key: NUTCH-445
> URL: https://issues.apache.org/jira/browse/NUTCH-445
> Project: Nutch
> Issue Type: New Feature
> Components: indexer, searcher
> Affects Versions: 0.9.0
> Reporter: Enis Soztutar
> Attachments: index_query_domain_v1.0.patch,
> index_query_domain_v1.1.patch, index_query_domain_v1.2.patch,
> TranslatingRawFieldQueryFilter_v1.0.patch
>
>
> Hostname's contain information about the domain of th host, and all of the
> subdomains. Indexing and Searching the domains are important for intuitive
> behavior.
> From DomainIndexingFilter javadoc :
> Adds the domain(hostname) and all super domains to the index.
> * <br> For http://lucene.apache.org/nutch/ the
> * following will be added to the index : <br>
> * <ul>
> * <li>lucene.apache.org </li>
> * <li>apache</li>
> * <li>org </li>
> * </ul>
> * All hostnames are domain names, but not all the domain names are
> * hostnames. In the above example hostname lucene is a
> * subdomain of apache.org, which is itself a subdomain of
> * org <br>
> *
>
> Currently Basic indexing filter indexes the hostname in the site field, and
> query-site plugin
> allows to search in the site field. However site:apache.org will not return
> http://lucene.apache.org
> By indexing the domain, we can be able to search domains. Unlike
> the site field (indexed by BasicIndexingFilter) search, searching the
> domain field allows us to retrieve lucene.apache.org to the query
> apache.org.
>
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