[Xapian-devel] Add an example to the community page and contribute more code

Olly Betts olly at survex.com
Sat Jan 12 06:49:34 GMT 2013

On Fri, Jan 11, 2013 at 12:17:07AM +0530, aarsh shah wrote:
> Hi guys.I've finished an example indexer which acts like a grep replacement
> for a file.It indexes each line containing a proper noun  in a given text
> file.The line containing the proper noun will be displayed upon searching
> for that noun.I would like to add it to the community code examples.I'm
> planning to write more examples which demonstrate some advanced features of
> Xapian along similar lines soon. Can anyone please help me on how to add my
> examples to the community ?

Cool.  There's a page on the wiki for examples here:


Anyone can edit the wiki - you just need to register first.

You can attach files to the wiki page, but I'd probably suggest using a
code hosting site (that's certainly a better option if it's more than a
single file).

> I now want to develop a Paice/Husk stemmer for Xapian.The stemmer itself is
> not that hard to implement and I already read the page mentioned in the
> resources for the stemming project.But Ive yet to fiddle with the code base
> and so don't know how to add the stemmer to the codebase.Il be extremely
> grateful if you could guide me here

You can subclass Xapian::StemImplementation and then wrap that in a
Xapian::Stem object to use where you'd use the built-in stemmers:


I'd probably suggest you just do it as an external stemmer first, and
once you have that working, then work on including it as part of the

> Moreover,I wold also love to write a patch for multiple spelling
> suggestions as Xapian only suggests one right now.Any help/suggestions ?

There's actually already a patch for that, along with a number of other
enhancements to spelling correction done as a GSoC project, but they're
all on a branch currently, and haven't yet been merged.

> My basic problem is that given any feature I want to fiddle
> with/improve/change,I don't know which part of the code base to access

Yeah, finding your way around a sizable source tree can take some
getting used to.  Have you seen this overview page?


> feel like I know a lot more about IR and Xapian than I used to :)



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