[Exist-open] restricting the scope of full text search makes it return false hits

[Lars B. <L.J...@uv...>]

Hi all,

Beginner's question. I'm trying to do full-text search in EXist 1.4
using Lucene (ft:query). I have a text collect and a working index.
The following returns a proper sequence of hits:

    let $scope := collection('/db/documents')//scene
    return $scope[ft:query(., $query)]

But now I want to narrow my search down to only include documents
having a certain type, so I restrict $scope with a predicate.

    let $scope := collection('/db/documents')/root[.//house[@type eq
"commons"]//scene
    return $scope[ft:query(., $query)]

Now I get only hits from the House of Commons, but I also get false
hits for all <scene> elements that have the same parent as a true hit.

Am I doing something wrong in my XPath?

TIA,

-- 
Lars Buitinck
Scientific programmer, ILPS
University of Amsterdam