On May 18, 2005, at 2:33 PM, KW Kor wrote:
On another note, is there any support for before/after phrase queries? I need to
construct a query that is able to search for documents where specific phrases
must appear in a fixed order in a document. For example, "Nobel Prize" must
occurr before "Roger Penrose" which must occurr before "Superstring Theory". So
the query would match "Nobel Prize winner, Roger Penrose, today published a
paper on Superstring Theory", but would not match "Roger Penrose today
published a paper on Superstring Theory. A Nobel Prize winner, ..."
The SpanQuery family of queries will do exactly this. Each term becomes a SpanTermQuery (rather than using a PhraseQuery) and then each phrase is a SpanNearQuery, and then nest those in another ordered SpanNearQuery with whatever distance you want to allow and whether it should be ordered or not ordered.
Btw, its great to see Lucene grow from its old SourceForge roots to a top level
project at apache.org. Thanks for keeping my name on the "Who we are" page even
though I have not contributed in years. Hello Doug, Otis, et al.
Welcome back!!!
Erik
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