Xapian discuss - Oct 2007 - I can't get prefixes to work

Xapian, omega and scriptindex version 1.0.3 from HEAD about a week ago.


This is from omega FMT=godmode. 
1 XRULERule_237 
<http://picolex.com/cgi-bin/firelex/omega.cgi?DB=trial%2fsec&FMT=godmode&B=XRULERule%5f237>

This is the code.
    my $query = "rule:Rule_237";
    my $qp = new Search::Xapian::QueryParser();
    $qp->set_stemmer(new Search::Xapian::Stem("english"));
    $qp->set_stemming_strategy(STEM_SOME);
    $qp->set_default_op($defaultop);
    $qp->add_boolean_prefix('rule','XRULE');
    my $par = $qp->parse_query($query);
    my $enq = $db->enquire( $par );
    print LOG "Running query ".
$enq->get_query()->get_description()."\n";;


I return no hits and the log reads:

Running query Xapian::Query(XRULE:Rule_237)

If I run a normal query for a word, it works as expected.  This holds 
true for lots of examples of rule:, not just this one.

I then used add_prefix and got closer:

Running query Xapian::Query(XRULErule_237:(pos=1))

So I tried
    my $query = "rule:rule_237";

Running query Xapian::Query(ZXRULErule_237:(pos=1))

It was indexed with:

rule : field boolean=XRULE

So what did I do wrong?

Thanks,
Jim.

On Tue, Oct 30, 2007 at 08:35:11PM -0400, Jim wrote:
> Xapian, omega and scriptindex version 1.0.3 from HEAD about a week ago.
> 
> 
> This is from omega FMT=godmode. 
> 1 XRULERule_237 
Note that this will be parsed as prefix "XRULER" on term
"ule_237".

If you want to add an X-prefix to a term which starts with a capital
letter, you need to insert a colon so it's clear where the prefix ends
and the term begins, which is why the QueryParser generates this:
> Running query Xapian::Query(XRULE:Rule_237)
So scriptindex is wrong for not inserting a ':' in this case.

Cheers,
    Olly