[Xapian-discuss] identifying matched terms

[Jason Toffaletti]

I finally got around to implementing this and I ran into another issue.
I'm using the xapian python bindings and whenever I call
positionlist_begin on a TermIterator, I get this:

File "/usr/lib/python2.4/site-packages/xapian.py", line 169, in
positionlist_begin
    def positionlist_begin(*args): return
_xapian.TermIterator_positionlist_begin(*args)
RuntimeError: InvalidOperationError: positionlist_begin not supported

Which is consistent with the code I see here:
http://www.xapian.org/docs/sourcedoc/html/termlist_8h-source.html

I don't think I can implement what I want without the positionlist. My
document is composed of terms that come from several sources and I need
to know the position of the term to figure out which source a term came
from and then relay that information to the front-end which would
highlight the term in its unmodified form.

Is positionlist something planned for the next revision?

Thanks,
Jason T.

On Fri, 2005-12-02 at 00:51 +0000, Olly Betts wrote:
> On Thu, Dec 01, 2005 at 04:27:32PM -0800, Jason Toffaletti wrote:
> > I'm having trouble finding information on how to identify which terms
> > within a document triggered a match for a query. I'd like to use this
> > information to highlight the terms when displaying query results to a
> > user, much like how gmane or google do. Is there an API for this
> > purpose?
> 
> Yes:
> 
> http://xapian.org/docs/apidoc/html/classXapian_1_1Enquire.html#a18
> 
> Hmm, it seems you should really be able to call methods on an
> MSetIterator to get this information - the Enquire class isn't the most
> logical place for them.  I'll have a look and see if there's a good
> reason why this is part of Enquire.
> 
> Cheers,
>     Olly
>