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https://issues.apache.org/jira/browse/SOLR-12376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16502219#comment-16502219
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ASF subversion and git services commented on SOLR-12376:
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Commit cf63392183ffc96428fc4c52f546fec2cdf766d5 in lucene-solr's branch
refs/heads/master from [~dsmiley]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=cf63392 ]
SOLR-12376: New TaggerRequestHandler (SolrTextTagger).
> New TaggerRequestHandler (aka SolrTextTagger)
> ---------------------------------------------
>
> Key: SOLR-12376
> URL: https://issues.apache.org/jira/browse/SOLR-12376
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Fix For: 7.4
>
> Attachments: SOLR-12376.patch, SOLR-12376.patch, SOLR-12376.patch
>
>
> This issue introduces a new RequestHandler: {{TaggerRequestHandler}}, AKA the
> SolrTextTagger from the OpenSextant project
> [https://github.com/OpenSextant/SolrTextTagger]. It's used for named entity
> recognition (NER) of text past to it. It doesn't do any NLP (outside of
> Lucene text analysis) so it's said to be a "naive tagger", but it's
> definitely useful as-is and a more complete NER or ERD (entity recognition
> and disambiguation) system can be built with this as a key component. The
> SolrTextTagger has been used on queries for query-understanding, and it's
> been used on full-text, and it's been used on dictionaries that number tens
> of millions in size. Since it's small and has been used a bunch (including
> helping win an ERD competition and in [Apache
> Stanbol|https://stanbol.apache.org/]), several people have asked me when or
> why isn't this in Solr yet. So here it is.
> To use it, first you need a collection of documents that have a name-like
> field (short text) indexed with the ConcatenateFilter (LUCENE-8323) at the
> end. We call this the dictionary. Once that's in place, you simply post text
> to a {{TaggerRequestHandler}} and it returns the offset pairs into that text
> for matches in the dictionary along with the uniqueKey of the matching
> documents. It can also return other document data desired. That's the gist;
> I'll add more details on use to the Solr Reference Guide.
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