Thanks Muir. Thanks for letting me know that I dont need language identifiers. I'll have a look and will try to write the analyzer. For my case I think it wont be that difficult. BTW, can you point me to some sample codes/tutorials writing custom analyzers. I could not find something in LIA2ndEdn. Is something htere? do let me know.
Thanks, KK. On Thu, Jun 4, 2009 at 6:19 PM, Robert Muir <rcm...@gmail.com> wrote: > KK, for your case, you don't really need to go to the effort of detecting > whether fragments are english or not. > Because the English stemmers in lucene will not modify your Indic text, and > neither will the LowerCaseFilter. > > what you want to do is create a custom analyzer that works like this > > -WhitespaceTokenizer with WordDelimiterFilter [from Solr nightly jar], > LowerCaseFilter, StopFilter, and PorterStemFilter- > > Thanks, > Robert > > On Thu, Jun 4, 2009 at 8:28 AM, KK <dioxide.softw...@gmail.com> wrote: > > > Thank you all. > > To be frank I was using Solr in the begining half a month ago. The > > problem[rather bug] with solr was creation of new index on the fly. > Though > > they have a restful method for teh same, but it was not working. If I > > remember properly one of Solr commiter "Noble Paul"[I dont know his real > > name] was trying to help me. I tried many nightly builds and spending a > > couple of days stuck at that made me think of lucene and I switched to > it. > > Now after working with lucene which gives you full control of everything > I > > don't want to switch to Solr.[LOL, to me Solr:Lucene is similar to > > Window$:Linux, its my view only, though]. Coming back to the point as Uwe > > mentioned that we can do the same thing in lucene as well, what is > > available > > in Solr, Solr is based on Lucene only, right? > > I request Uwe to give me some more ideas on using the analyzers from solr > > that will do the job for me, handling a mix of both english and > non-english > > content. > > Muir, can you give me a bit detail description of how to use the > > WordDelimiteFilter to do my job. > > On a side note, I was thingking of writing a simple analyzer that will do > > the following, > > #. If the webpage fragment is non-english[for me its some indian > language] > > then index them as such, no stemming/ stop word removal to begin with. As > I > > know its in UCN unicode something like \u0021\u0012\u34ae\u0031[just a > > sample] > > # If the fragment is english then apply standard anlyzing process for > > english content. I've not thought of quering in the same way as of now > i.e > > mix of non-english and engish words. > > Now to get all this, > > #1. I need some sort of way which will let me know if the content is > > english or not. If not english just add the tokens to the document. Do we > > really need language identifiers, as i dont have any other content that > > uses > > the same script as english other than those \u1234 things for my indian > > language content. Any smart hack/trick for the same? > > #2. If the its english apply all normal process and add the stemmed > token > > to document. > > For all this I was thinking of iterating earch word of the web page and > > apply the above procedure. And finallyadd the newly created document to > > the > > index. > > > > I would like some one to guide me in this direction. I'm pretty people > must > > have done similar/same thing earlier, I request them to guide me/ point > me > > to some tutorials for the same. > > Else help me out writing a custom analyzer only if thats not going to be > > too > > complex. LOL, I'm a new user to lucene and know basics of Java coding. > > Thank you very much. > > > > --KK. > > > > > > > > On Thu, Jun 4, 2009 at 5:30 PM, Robert Muir <rcm...@gmail.com> wrote: > > > > > yes this is true. for starters KK, might be good to startup solr and > look > > > at > > > http://localhost:8983/solr/admin/analysis.jsp?highlight=on > > > > > > if you want to stick with lucene, the WordDelimiterFilter is the piece > > you > > > will want for your text, mainly for punctuation but also for format > > > characters such as ZWJ/ZWNJ. > > > > > > On Thu, Jun 4, 2009 at 7:51 AM, Uwe Schindler <u...@thetaphi.de> wrote: > > > > > > > You can also re-use the solr analyzers, as far as I found out. There > is > > > an > > > > issue in jIRA/discussion on java-dev to merge them. > > > > > > > > ----- > > > > Uwe Schindler > > > > H.-H.-Meier-Allee 63, D-28213 Bremen > > > > http://www.thetaphi.de > > > > eMail: u...@thetaphi.de > > > > > > > > > > > > > -----Original Message----- > > > > > From: Robert Muir [mailto:rcm...@gmail.com] > > > > > Sent: Thursday, June 04, 2009 1:18 PM > > > > > To: java-user@lucene.apache.org > > > > > Subject: Re: How to support stemming and case folding for english > > > content > > > > > mixed with non-english content? > > > > > > > > > > KK, ok, so you only really want to stem the english. This is good. > > > > > > > > > > Is it possible for you to consider using solr? solr's default > > analyzer > > > > for > > > > > type 'text' will be good for your case. it will do the following > > > > > 1. tokenize on whitespace > > > > > 2. handle both indian language and english punctuation > > > > > 3. lowercase the english. > > > > > 4. stem the english. > > > > > > > > > > try a nightly build, > > > > http://people.apache.org/builds/lucene/solr/nightly/ > > > > > > > > > > On Thu, Jun 4, 2009 at 1:12 AM, KK <dioxide.softw...@gmail.com> > > wrote: > > > > > > > > > > > Muir, thanks for your response. > > > > > > I'm indexing indian language web pages which has got descent > amount > > > of > > > > > > english content mixed with therein. For the time being I'm not > > going > > > to > > > > > use > > > > > > any stemmers as we don't have standard stemmers for indian > > languages > > > . > > > > > So > > > > > > what I want to do is like this, > > > > > > Say I've a web page having hindi content with 5% english content. > > > Then > > > > > for > > > > > > hindi I want to use the basic white space analyzer as we dont > have > > > > > stemmers > > > > > > for this as I mentioned earlier and whereever english appears I > > want > > > > > them > > > > > > to > > > > > > be stemmed tokenized etc[the standard process used for english > > > > content]. > > > > > As > > > > > > of now I'm using whitespace analyzer for the full content which > > > doesnot > > > > > > support case folding, stemming etc for teh content. So if there > is > > an > > > > > > english word say "Detection" indexed as such then searching for > > > > > detection > > > > > > or > > > > > > detect is not giving any results, which is the expected behavior, > > but > > > I > > > > > > want > > > > > > this kind of queries to give results. > > > > > > I hope I made it clear. Let me know any ideas on doing the same. > > And > > > > one > > > > > > more thing, I'm storing the full webpage content under a single > > > field, > > > > I > > > > > > hope this will not make any difference, right? > > > > > > It seems I've to use language identifiers, but do we really need > > > that? > > > > > > Because we've only non-english content mixed with english[and not > > > > french > > > > > or > > > > > > russian etc]. > > > > > > > > > > > > What is the best way of approaching the problem? Any thoughts! > > > > > > > > > > > > Thanks, > > > > > > KK. > > > > > > > > > > > > On Wed, Jun 3, 2009 at 9:42 PM, Robert Muir <rcm...@gmail.com> > > > wrote: > > > > > > > > > > > > > KK, is all of your latin script text actually english? Is there > > > stuff > > > > > > like > > > > > > > german or french mixed in? > > > > > > > > > > > > > > And for your non-english content (your examples have been > indian > > > > > writing > > > > > > > systems), is it generally true that if you had devanagari, you > > can > > > > > assume > > > > > > > its hindi? or is there stuff like marathi mixed in? > > > > > > > > > > > > > > Reason I say this is to invoke the right stemmers, you really > > need > > > > > some > > > > > > > language detection, but perhaps in your case you can cheat and > > > detect > > > > > > this > > > > > > > based on scripts... > > > > > > > > > > > > > > Thanks, > > > > > > > Robert > > > > > > > > > > > > > > > > > > > > > On Wed, Jun 3, 2009 at 10:15 AM, KK < > dioxide.softw...@gmail.com> > > > > > wrote: > > > > > > > > > > > > > > > Hi All, > > > > > > > > I'm indexing some non-english content. But the page also > > contains > > > > > > english > > > > > > > > content. As of now I'm using WhitespaceAnalyzer for all > content > > > and > > > > > I'm > > > > > > > > storing the full webpage content under a single filed. Now we > > > > > require > > > > > > to > > > > > > > > support case folding and stemmming for the english content > > > > > intermingled > > > > > > > > with > > > > > > > > non-english content. I must metion that we dont have stemming > > and > > > > > case > > > > > > > > folding for these non-english content. I'm stuck with this. > > Some > > > > one > > > > > do > > > > > > > let > > > > > > > > me know how to proceed for fixing this issue. > > > > > > > > > > > > > > > > Thanks, > > > > > > > > KK. > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > Robert Muir > > > > > > > rcm...@gmail.com > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > Robert Muir > > > > > rcm...@gmail.com > > > > > > > > > > > > --------------------------------------------------------------------- > > > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > > > > > > > > > > > > -- > > > Robert Muir > > > rcm...@gmail.com > > > > > > > > > -- > Robert Muir > rcm...@gmail.com >
