Cool, thanks Robert. I'll take a look at the JIRA ticket. On 19 Mar 2012, at 14:44, Robert Muir wrote:
> On Mon, Mar 19, 2012 at 10:38 AM, Alan Woodward > <alan.woodw...@romseysoftware.co.uk> wrote: >> Hello, >> >> The project I'm currently working on requires the reporting of exact hit >> positions from some pretty hairy queries, not all of which are covered by >> the existing highlighter modules. I'm working round this by translating >> everything into SpanQueries, and using the getSpans() method to locate hits >> (I've extended the Spans interface to make term offsets available - >> see https://issues.apache.org/jira/browse/LUCENE-3826). This works for our >> use-case, but isn't terribly efficient, and obviously isn't applicable to >> non-Span queries. >> >> I've seen a bit of chatter on the list about using term offsets to provide >> accurate highlighting in Lucene. I'm going to have a couple of weeks free >> in April, and I thought I might have a go at implementing this. Mainly I'm >> wondering if there's already been thoughts about how to do it. My current >> thoughts are to somehow extend the Weight and Scorer interface to make term >> offsets available; to get highlights for a given set of documents, you'd >> essentially run the query again, with a filter on just the documents you >> want highlighted, and have a custom collector that gets the term offsets in >> place of the scores. >> > > Hi Alan, Simon started some initial work on > https://issues.apache.org/jira/browse/LUCENE-2878 > > Some work and prototypes were done in a branch, but it might be > lagging behind trunk a bit. > > Additionally at the time it was first done, I think we didn't yet > support offsets in the postings lists. > We've since added this and several codecs support it. > > -- > lucidimagination.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org > For additional commands, e-mail: dev-h...@lucene.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
