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From: Steven A Rowe <sarowe@syr.edu>
To: "java-user@lucene.apache.org" <java-user@lucene.apache.org>
Date: Fri, 5 Feb 2010 17:23:12 -0500
Subject: RE: Match span of capitalized words
Thread-Topic: Match span of capitalized words
Thread-Index: AcqmdogeNrkdJd+QSEaQbCp1pdNdBwAK2A4g
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 <2D127F11DC79714E9B6A43AC9458147F36661FEE@suex07-mbx-03.ad.syr.edu>
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Hi Max,

On 02/05/2010 at 10:18 AM, Grant Ingersoll wrote:
> On Feb 3, 2010, at 8:57 PM, Max Lynch wrote:
> > Hi, I would like to do a search for "Microsoft Windows" as a span, but
> > not match if words before or after "Microsoft Windows" are upper cased.
> >=20
> > For example, I want this to match: another crash for Microsoft Windows
> > today But not this: another crash for Microsoft Windows Server today
> >=20
> > Is this possible?  My first attempt started with the SpanRegexQuery
> > from the regex contrib package, but I can't figure out how to put in a
> > term I do want to match but don't want to include in the final
> > highlighting match. Does that make sense?
> >=20
> > My example (using WhitespaceAnalyzer since I care about case):
> >=20
> > SpanRegexQuery srq1 =3D new SpanRegexQuery(new Term("contents", "Chase"=
));
> > SpanRegexQuery srq2 =3D new SpanRegexQuery(new Term("contents", "Bank[\=
\.]*"));
> > SpanRegexQuery srq3 =3D new SpanRegexQuery(new Term("contents", "[^A-Z]=
*"));
>=20
> I'm not sure it supports it, but I wonder if you could use a negative
> lookahead assertion?  Most regex languages support it.

I don't think this would work, since the input to a SpanRegexQuery regex is=
 a single Term; following Terms are not included in the input.

I *think* you can get what you want using SpanNotQuery - something like the=
 following, using your "Microsoft Windows" example:

SpanNot:
    include:
        SpanNear(in-order=3Dtrue, slop=3D0):
            SpanTerm: "Microsoft"
            SpanTerm: "Windows"
    exclude:
        SpanNear(in-order=3Dtrue, slop=3D0):
            SpanTerm: "Microsoft"
            SpanTerm: "Windows"
            SpanRegex: "^\\p{Lu}.*"

Steve
=20


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