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https://issues.apache.org/jira/browse/JENA-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16329188#comment-16329188
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ASF GitHub Bot commented on JENA-1459:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/jena/pull/339
> add highlighting support to jena-text
> -------------------------------------
>
> Key: JENA-1459
> URL: https://issues.apache.org/jira/browse/JENA-1459
> Project: Apache Jena
> Issue Type: Improvement
> Components: Jena, Text
> Affects Versions: Jena 3.6.0
> Reporter: Code Ferret
> Assignee: Code Ferret
> Priority: Major
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> This issue proposes an improvement to jena-text to include optional
> highlighting of results via:
> {{org.apache.lucene.search.highlight.Highlighter}}
> and
> {{org.apache.lucene.search.highlight.SimpleHTMLFormatter}}
> The improvement will add an optional input argument to {{TextQueryPF}} that
> signals that highlighting should be performed on the Lucene search results;
> optionally indicates the _start_ and _end_ char sequences of a highlighted
> term; optionally indicates the maximum number of fragments to highlight; and
> optionally indicates a fragment separator.
> The highlighted results are bound to the {{?literal}} output argument of
> {{TextQueryPF}}.
> Inclusion of this improvement will introduce a simple extraction of the
> _highlight_ option string and a single test for the presence of the option
> string so that the inclusion of the improvement will be of minimal impact
> when highlighting is not used. The _highlight_ option string is passed
> directly to {{TextIndex.query(...)}} and so can be used from code other than
> {{TextQueryPF}}.
> The simplest use of highlighting is like:
> {code}
> select ?s ?lit
> where {
> (?s ?sc ?lit) text:query (skos:prefLabel "one" 100 "lang:en" "highlight:") .
> }
> {code}
> which will produce results such as:
> {code}
> "another ↦one↤ abc"@en
> {code}
> the right-arrow (\u21a6) and left-arrow (\u21a4) are the default _start_ and
> _end_ highlighting character sequences. These are chosen to be very unlikely
> to occur in literals. These can be changed easily via {{"s:"}} and {{"e:"}}
> in the highlight options, for example:
> {code}
> select ?s ?lit
> where {
> (?s ?sc ?lit) text:query (skos:prefLabel "one" 100 "lang:en" "highlight:
> s:<em class='hilite'> | e:</em>") .
> {code}
> which will produce results such as:
> {code}
> "another <em class='hilite'>one</em> abc"@en
> {code}
> Coding of this improvement is complete and a PR can be issued if there is
> agreement that this improvement should be included in jena-text.
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