On 10/08/2009 09:23 AM, Uwe Schindler wrote:
Just an addition: The lowercase filter is only for the case of embedded
non-arabic words. And these will not appear in the stop words.
I learned something new!
Hmm. If one has a mixed Arabic / English text, shouldn't one be able to
augment the stopwords list with English stop words? And if so, shouldn't
the stop filter come after the lower case filter?
-- DM
-----Original Message-----
From: Basem Narmok [mailto:nar...@gmail.com]
Sent: Thursday, October 08, 2009 4:20 PM
To: java-dev@lucene.apache.org
Subject: Re: Arabic Analyzer: possible bug
DM, there is no upper/lower cases in Arabic, so don't worry, but the
stop word list needs some corrections and may miss some common/stop
Arabic words.
Best,
On Thu, Oct 8, 2009 at 4:14 PM, DM Smith<dmsmith...@gmail.com> wrote:
Robert,
Thanks for the info.
As I said, I am illiterate in Arabic. So I have another, perhaps
nonsensical, question:
Does the stop word list have every combination of upper/lower case for
each
Arabic word in the list? (i.e. is it fully de-normalized?) Or should it
come
after LowerCaseFilter?
-- DM
On Oct 8, 2009, at 8:37 AM, Robert Muir wrote:
DM, this isn't a bug.
The arabic stopwords are not normalized.
but for persian, i normalized the stopwords. mostly because i did not
want
to have to create variations with farsi yah versus arabic yah for each
one.
On Thu, Oct 8, 2009 at 7:24 AM, DM Smith<dmsmith...@gmail.com> wrote:
I'm wondering if there is a bug in ArabicAnalyzer in 2.9. (I don't
know
Arabic or Farsi, but have some texts to index in those languages.)
The tokenizer/filter chain for ArabicAnalyzer is:
TokenStream result = new ArabicLetterTokenizer( reader );
result = new StopFilter( result, stoptable );
result = new LowerCaseFilter(result);
result = new ArabicNormalizationFilter( result );
result = new ArabicStemFilter( result );
return result;
Shouldn't the StopFilter come after ArabicNormalizationFilter?
As a comparison the PersianAnalyzer has:
TokenStream result = new ArabicLetterTokenizer(reader);
result = new LowerCaseFilter(result);
result = new ArabicNormalizationFilter(result);
/* additional persian-specific normalization */
result = new PersianNormalizationFilter(result);
/*
* the order here is important: the stopword list is normalized
with
the
* above!
*/
result = new StopFilter(result, stoptable);
return result;
Thanks,
DM
--
Robert Muir
rcm...@gmail.com
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