Hi All,

one question concerning search results with the booleon NOT: We get (in
some cases) distinct results by using 'AND NOT' or '-'. Different
results seem to occur, when a query begins with 'and not'/'-' or only
'and not'/'-' exists in a query.

Some examples on atlantis (invenio 1.1.4):

'-factory' (http://invenio-demo.cern.ch/search?p=-factory) -> returns 88
records
'and not factory' (http://invenio-demo.cern.ch/search?p=and+not+factory)
-> returns 64 records

'-factory and the'
(http://invenio-demo.cern.ch/search?p=-factory+and+the) -> returns 62
records, like 'the -factory'
'and not factory and the'
(http://invenio-demo.cern.ch/search?p=and+not+factory+and+the) ->
returns 55 records, vesus 62 records with 'the and not factory '

What is the different and is it a bug or a feature? It seems that only
'-' returns always the 'correct' result?!

Kind Regards
Cornelia

--
Cornelia Plott
Zentralbibliothek
Forschungszentrum Jülich
D-52425 Jülich
GERMANY

Tel: +49-2461-61-1586
Email: [email protected]
Web: http://www.fz-juelich.de/zb



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