RE: Lucene in Action e-book now available!

[William W]

Am I the first one who bought the Lucene in Action book ?
Thanks Erik and Otis.
William W. Silva

From: Erik Hatcher <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene User <[EMAIL PROTECTED]>,Lucene List 
<[EMAIL PROTECTED]>
Subject: Lucene in Action e-book now available!
Date: Fri, 10 Dec 2004 03:52:55 -0500

The Lucene in Action e-book is now available at Manning's site:
http://www.manning.com/hatcher2
Manning also put lots of other goodies there, the table of contents, "about 
this book", preface, the foreward from Doug Cutting himself (thanks 
Doug!!!), and a couple of sample chapters.  The complete source code is 
there as well.

Now comes the exciting part to find out what others think of the work Otis 
and I spent 14+ months of our lives on.

Erik
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Re: Clustering lucene's results

[William W]

Thanks Dawid ! :)

From: Dawid Weiss <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene Users List <[EMAIL PROTECTED]>
Subject: Re: Clustering lucene's results
Date: Thu, 07 Oct 2004 10:39:26 +0200
Hi William,
Ok, here is some demo code I've put together that shows how you can achieve 
clustering of Lucene's results. I hope this will get you started on your 
projects. If you have questions, please don't hesitate to ask -- cross 
posts to carrot2-developers would be a good idea too.

The code (plus the binaries so that you don't have to check out all of 
Carrot2 ;) are at:
http://www.cs.put.poznan.pl/dweiss/tmp/carrot2-lucene.zip

Take a look at Demo.java -- it is the main link between Lucene and Carrot. 
Play with the parameters, I used 100 as the number of search results to be 
clustered. Adjust it to your needs.

int start = 0;
int requiredHits = 100;
I hope the code will be self-explanatory.
Good luck,
Dawid
From the readme file:
An example of using Carrot2 components to clustering search
results from Lucene.
===
Prerequisities
--
You must have an index created with Lucene and containing
documents with the following fields: url, title, summary.
The Lucene demo works with exactly these fields -- I just indexed
all of Lucene's source code and documentation using the following line:
mkdir index
java -Djava.ext.dirs=build org.apache.lucene.demo.IndexHTML -create -index 
index .

The index is now in 'index' folder.
Remember that the quality of snippets and titles heavily influences the
output of the clustering; in fact, the above example index of Lucene's API 
is
not too good because most queries will return nonsensical cluster labels
(see below).

Building Carrot2-Lucene demo

Basically you should have all of Carrot2 source code checked out and
issue the building command:
ant -Dcopy.dependencies=true
All of the required libraries and Carrot2 components will end up
in 'tmp/dist/deps-carrot2-lucene-example-jar' folder.
You can also spare yourself some time and download precompiled binaries
I've put at:
http://www.cs.put.poznan.pl/dweiss/tmp/carrot2-lucene.zip
Now, once you have the compiled binaries, issue the following command
(all on one line of course):
java -Djava.ext.dirs=tmp\dist;tmp\dist\deps-carrot2-lucene-example-jar \
com.dawidweiss.carrot.lucene.Demo index query
The first argument is the location of the Lucene's index created before. 
The second argument
is a query. In the output you should have clusters and max. three documents 
from every cluster:

Results for: query
Timings: index opened in: 0,181s, search: 0,13s, clustering: 0,721s
 :> Search Lucene Rc1 Dev API
- 
F:/Repositories/cvs.apache.org/jakarta-lucene/build/docs/api/org/apache/lucene/search/class-use/Query.html
  Uses of Class org.apache.lucene.search.Query (Lucene 1.5-rc1-dev 
API)
- 
F:/Repositories/cvs.apache.org/jakarta-lucene/build/docs/api/org/apache/lucene/search/package-summary.html
  org.apache.lucene.search (Lucene 1.5-rc1-dev API)
- 
F:/Repositories/cvs.apache.org/jakarta-lucene/build/docs/api/org/apache/lucene/search/package-use.html
  Uses of Package org.apache.lucene.search (Lucene 1.5-rc1-dev API)
  (and 19 more)

 :> Jakarta Lucene
- F:/Repositories/cvs.apache.org/jakarta-lucene/src/java/overview.html
  Jakarta Lucene API
- F:/Repositories/cvs.apache.org/jakarta-lucene/docs/whoweare.html
  Jakarta Lucene - Who We Are - Jakarta Lucene
- F:/Repositories/cvs.apache.org/jakarta-lucene/docs/index.html
  Jakarta Lucene - Overview - Jakarta Lucene
  (and 12 more)
If you look at the source code of Demo.java, there are plenty of things
apt for customization -- number of results from each cluster, number of 
displayed
clusters (I would cut it to some reasonable number, say 10 or 15 -- the 
further a
cluster is from the "top", the less it is likely to be important). Also 
keep
in mind that some of Carrot2 components produce hierarchical clusters. This 
demonstration
works with "flat" version of Lingo algorithm, so you don't need to worry 
about it.

Hope this gets you started with using Carrot2 and Lucene.
Please let me know about any successes or failures.
Dawid
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Re: Clustering lucene's results

[William W]

Hi Dawid,
The demos (under /src/demo) are very good. They have the basic usage 
scenario.
Thanks Andrzej.
William.


Dawid Weiss wrote:
Hi William,
No, I don't have examples because I never used Lucene directly. If you 
provide me with a sample index and an API that executes a query on this 
index (I need document titles, summaries, or snippets and an anchor 
(identifier), can be an URL).
Hi Dawid :-)
I believe the approach to this component should be that you first 
initialize it by reading a mapping of Lucene index field names to "logical" 
names (metadata) like title, url, body, etc. The reason is that each index 
uses its own metadata schema, i.e. in Lucene-speak, the field names.

Moreover, when you execute a query you get just a document id plus its 
score. It's up to you to build a snippet. There is a code in the 
jakarta-lucene-sandbox CVS repo. (highlighter) to create snippets from the 
query and the hit list, take a look at this...

Send me such a snippet and I'll try to write the integration code with 
Lucene. It is only a matter of writing a simple InputComponent instance 
and this is really trivial (see Nutch's plugin code).
The basic usage scenario is that you open the IndexReader (either using 
directory name as a String or a Directory instance), and then create a 
Query instance, usually using QueryParser, and finally you search using 
IndexSearcher. You get a list of Hits, which you can use to get scores, and 
the contents of the documents. Take a look at the IndexFiles and 
SearchFiles classes in org.apache.lucene.demo package (under /src/demo).

--
Best regards,
Andrzej Bialecki
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CEN/ISSS EC Workshop, ECIMF project chair
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RE: Clustering lucene's results

[William W]

Hi Dawid,
I would like to use Carrot2 with lucene. Do you have examples ?
Thanks a lot,
William.

From: Dawid Weiss <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Clustering lucene's results
Date: Thu, 23 Sep 2004 13:36:03 +0200
Dear all,
I saw a post about an attempt to integrate Carrot2 with Lucene. It was a 
while ago, so I'm curious if any outcome has been achieved.

Anyway, as the project coordinator I can offer my help with such 
integration; if you're looking for some ready-to-use code then there is a 
clustering plugin for Nutch that integrates one of the clustering 
algorithms from Carrot2 with Nutch; I'm sure porting it to Lucene wouldn't 
be a big problem.

Ragards,
Dawid
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RE: JavaOne and Lucene

[William W]

Hi Erik,
I would like to buy your book !:)
When, where? :)
Thx,
William.
From: Erik Hatcher <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene User <[EMAIL PROTECTED]>
Subject: JavaOne and Lucene
Date: Wed, 23 Jun 2004 14:33:52 -0400
I'm presenting "Lucene in Action" Tuesday morning next week at JavaOne 
(TS-2994).

Any other Luceners going to JavaOne?
Erik
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RE: carrot2 - Re: Categorization

[William W]

Hi,
Carrot seems to be very interesting but I didn't find a simple example :(
I will try to use it ! :)
Thx,
william.

From: David Spencer <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene Users List <[EMAIL PROTECTED]>
Subject: carrot2 - Re: Categorization
Date: Wed, 23 Jun 2004 11:50:22 -0700
Otis Gospodnetic wrote:
Hello William,
Lucene does not have a categorization engine, but you may want to look
at Carrot2 (http://sourceforge.net/projects/carrot2/)
May be getting off topic - but maybe not..I can't find an example of how to 
use Carrot2. It builds easy enough, but there's no obvious example what it 
takes as input ("documents"?) and what it returns as output (some list of 
clustered docs?). I want to use the "local interface" to it and hook it 
into Lucene.

thx,
 Dave

Otis
--- William W <[EMAIL PROTECTED]> wrote:
Hi,
How can I do a categorization of the results ? Is it possible with
the Lucene API ?
Thanks,
William.
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Categorization

[William W]

Hi,
How can I do a categorization of the results ? Is it possible with the 
Lucene API ?
Thanks,
William.

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i411 Faceted Metadata Search

[William W]

Hi,

Who knows the diference between i411 Faceted Metadata Search and Lucene 
Search Engine.

Thanks,

William.

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Re: Lucene Book

[William W]

Hi Erik,

I'm very anxious ! :)

Thanks !!

William.

From: Erik Hatcher <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: "Lucene Users List" <[EMAIL PROTECTED]>
Subject: Re: Lucene Book
Date: Wed, 4 Feb 2004 13:18:07 -0500
On Feb 4, 2004, at 12:21 PM, William W wrote:
Hi Erik,
How is the book ? ;)
William.
:)

Otis and I are burning the midnight oil to get this thing done as soon as 
possible.  We are probably 3/4 done with the manuscript.  We've been 
through one review cycle.  The bulk should be done by the end of March 
leaving it up to the sluggish publishing process before it hits the 
shelves.

	Erik

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Lucene Book

[William W]

Hi Erik,
How is the book ? ;)
William.
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RE: Ordening documents

[William W]

Hi Folks,

To the order of the result What really matters is ONLY the order in which 
the information is stored in the index ?

Thanks,
William.


From: "William W" <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Ordening documents
Date: Fri, 16 Jan 2004 19:14:06 +
Hi folks,

I have some documents

 doc 1 ==>  name="Palm Zire"
 doc 2 ==>  name="Palm Zilion Zire"
 doc 3 ==>  name="Palm Test"
I will insert these docs in my index following the order  doc 1, doc 2, 
doc3.

If I execute the query ==> name:Palm
Witch order will the documents come ?
And if I execute the query ==> name:(Palml Zire) ??

I thougth that the documents would ALWAYS be in the order that I included 
in the index.

How will I know the order of the result ?

Thanks,
William.
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Ordening documents

[William W]

Hi folks,

I have some documents

 doc 1 ==>  name="Palm Zire"
 doc 2 ==>  name="Palm Zilion Zire"
 doc 3 ==>  name="Palm Test"
I will insert these docs in my index following the order  doc 1, doc 2, 
doc3.

If I execute the query ==> name:Palm
Witch order will the documents come ?
And if I execute the query ==> name:(Palml Zire) ??

I thougth that the documents would ALWAYS be in the order that I included in 
the index.

How will I know the order of the result ?

Thanks,
William.
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Re: Two possible solutions on Parallel Searching

[William W]

Hi Folks,

If I have two indexes and use the MultiSearcher will it  be faster than only 
one index with all the documents ?
Thanks,
William.

From: Doug Cutting <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene Users List <[EMAIL PROTECTED]>
Subject: Re: Two possible solutions on Parallel Searching
Date: Thu, 13 Nov 2003 09:16:38 -0800
First, note that the approaches you describe will only improve performance 
if you have multiple CPUs and/or multiple disks holding the indexes.

Second, MultiSearcher is currently implemented to search indexes serially, 
not each in a separate thread.  To implement multi-threaded searching one 
could subclass MultiSearcher with, e.g., ParallelSearcher, and override the 
search() methods with multi-threaded implemenations. This would be a great 
contribution if someone is interested!

The parallel approach I prefer is to maintain a set of indexes, each on a 
separate machine, then use something like a ParallelSearcher of 
RemoteSearchables to search them all.

Doug

Jie Yang wrote:
I had a thought on my earlier post on "Poor
Performance when searching for 500+ terms".
The problem is on how to improve the performance when
searching for 500+ OR search terms. i.e. enter a
search string of :
W1 OR W2 OR W3 OR .. OR w500.

I thought I could rewrite the MultiSearcher class so
that it can initiate multiple parallel IndexSearchers
to perform the search.
Solution 1 would be divide the query string of "500 OR
conditions terms" into 25 "20 OR conditions terms",
and then pass them to MultiSearcher, MultiSearcher
then initiate 25 threads to search on a single index
directory.
Solution 2 would be when building an index of 1
million docs, instead of building one single index
containing 1 million docs,
build 10 index directory eaching containing 100K
records. then I pass a single query string of "500 OR
conditions terms" to
MultiSearcher, MultiSearcher then initiate 10 threads
to search for 10 different index directories.
Has anyone tried something similar, which solution
would be a better one. Also is using multiple threads
on a single directory a good ideal? Are there any
bottlenecks for threads acessing resources, or
I better pass requests into different processes.
Thanks a lot



 --- Jie Yang <[EMAIL PROTECTED]> wrote: > Thanks
Julian
I am not using RAMDirectory due to the large size of
index file. the index generated on hard disc is
1.57G
for 1 million documents, each document has average
500
terms. I am using Field.UnStored(fieldName, terms),
so
i beliece I am not storing the documents, just the
index. (is that right?) is there anyway to reduce
the
index size created? also What is the maximum size of
data can be stored in RAMDirectory? I suppose I
could
get a 10G RAM solaris box, but would that be
advisable
say storing 2-3G of index data in memory? Also, what
is the performance boost factor when RAMDirectory
comparing to FSDirectory. Are we taling about > 100%
here?
On your 2nd and 3rd suggestion, I probably run the
latest code that includes the fix by Dmitry
Serebrennikov, the build was checked out from CVS
yesterday. and I used a QueryParser similar to the
one
used in the demo code.
Again, I still feel a bit curious and want to find
out
does lucene do (or in the future) pre-filter on "AND
join conditions". For example, A AND (B OR C OR D).
if
A finds 100 docs out of 1 million, can lucene
restrict
the searchs on B,C,D only within the 100 docs found?
Thanks a lot.








Response to: Poor Performance when searching for
500+

terms (Jie Yang)

From: Julien Nioche <[EMAIL PROTECTED]>
Subject: Poor Performance when searching for 500+
terms
Date: Thu, 13 Nov 2003 12:45:50 +0100
Content-Type: text/plain; charset="iso-8859-1"
Hello,

Since there are a lot of Term objects in your
Query,

your application must
spend a lot of time collecting information about those Terms.
1/ Do you use RAMDirectory? Loading the whole Directory into memory will
increase speed - your index must not be too big
though

2/ You are probably not using the QueryParser - so when you are building 
the
Query you could sort the Term objects inside a BooleanQuery. Sorting the
Terms will reduce jumps on disk. I have no
benchmarks


for this, but
logically, it should have some positive effect when

using FSDirectory. Am I wrong?

3/ There was a patch submitted by Dmitry
Serebrennikov

(http://www.mail-archive.com/[EMAIL PROTECTED]/msg02762.html)

which reduced garbage collecting by limiting the creation of temporary 
Term objects. This patch has not been included in Lucene code (a bug in 
it?).

Hope it helps.

Julien





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Re: Best practice

[William W]

Hi Erik,
I'm using Lucene more than one year in our project. Lucene gave us the 
flexibility that we need ( - the like %something  syntax :).
But... I would like to know if we are doing everything in the best way 
(nothing in particular).
Why don't you write a book about Lucene ? : )
Thanks Erik,
William.


From: Erik Hatcher <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: "Lucene Users List" <[EMAIL PROTECTED]>
Subject: Re: Best practice
Date: Tue, 28 Oct 2003 09:20:50 -0500
On Tuesday, October 28, 2003, at 08:54  AM, William W wrote:
Is there any Lucene best practice ?
Is there anything in particular you're interested in knowing about?  This 
list and its archives contain in conjunction with the jGuru FAQ are the 
best sources for such info currently as well as the articles that can 
be found on the Lucene website.  In fact, I'll pre-hype another java.net 
article that I'm writing as we speak- it is on QueryParser, detailing what 
it does and the caveats to its use.

I have a pretty good feeling that we'll be treated to more writings on 
Lucene in the near future ;)

	Erik

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Best practice

[William W]

Hi Folks,
Is there any Lucene best practice ?
Thanks,
William.
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Re: Book

[William W]

Otis,
I would like to read your articles . Is it possible ?
Thanks,
William.




From: Otis Gospodnetic <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene Users List <[EMAIL PROTECTED]>
Subject: Re: Book
Date: Wed, 20 Nov 2002 20:59:40 -0800 (PST)

I wrote a few articles that I'm trying to publish somewhere now.
Cheaper than a book :)

Otis

--- William W <[EMAIL PROTECTED]> wrote:
>
> I would like to buy a book about Lucene.
> Who could write it ? : )


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Book

[William W]

I would like to buy a book about Lucene.
Who could write it ? : )

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Re: Readonly indexes

[William W]

Sometimes I have a commit.lock (timeout error). I want disable the 
commit.lock creation. Is it possible ?
William.

From: Otis Gospodnetic <[EMAIL PROTECTED]>
Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
To: Lucene Users List <[EMAIL PROTECTED]>
Subject: Re: Readonly indexes
Date: Fri, 8 Nov 2002 07:24:21 -0800 (PST)

Are you getting an error of some kind?  Version of Lucene?

--- William W <[EMAIL PROTECTED]> wrote:
>
>
> How can I search a readonly index ?
>
>
> William.


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Readonly indexes

[William W]

How can I search a readonly index ?


William.

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Re: Portuguese Analyser

[William W]

Hi Otis,
I'm finally working on the Portuguese Analyser, and I have a question.
I would like to use the org.apache.lucene.analysis.de.WordlistLoader, but I 
think that it could be in the util package. What should I do ? Use the 
org.apache.lucene.analysis.de.WordlistLoader  or replicate it to 
org.apache.lucene.analysis.br.WordlistLoader ??

Thanks
William.


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RES: Portuguese Analyser

[William W]

Sure !!
I want it !!
Can you send me ?
Thanks,
William.


>From: Bizu de Anúncio <[EMAIL PROTECTED]>
>Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
>To: "Lucene Users List" <[EMAIL PROTECTED]>
>Subject: RES: Portuguese Analyser
>Date: Fri, 14 Jun 2002 08:35:39 -0300
>
>   I did one based on the Steammer Algorithm (algoritmo), but i didnt have
>time to test.
>
>   I can send u if u want ... maybe u can help me to test it ... I stopped
>because I dont know ANT ...
>
>   bye
>
>   jk
>
>
>
>
>-Mensagem original-
>De: William W [mailto:[EMAIL PROTECTED]]
>Enviada em: Tuesday, June 11, 2002 4:18 PM
>Para: [EMAIL PROTECTED]
>Assunto: Portuguese Analyser
>
>
>
>Hi All,
>
>Somebody have a Portuguese Analyser ?
>Thanks,
>William.
>
>_
>Chat with friends online, try MSN Messenger: http://messenger.msn.com
>
>
>--
>To unsubscribe, e-mail:
><mailto:[EMAIL PROTECTED]>
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><mailto:[EMAIL PROTECTED]>
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Portuguese Analyser

[William W]

Hi All,

Somebody have a Portuguese Analyser ?
Thanks,
William.

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Re: Query Parser Syntax documentation now available

[William W]

Peter,

  What do you mean with

  "This will make documents with the term IBM appear more relevant. You can 
also boost Phrase Terms as in the example: "

  Where is the example with "IBM" ?

  I think that the example
"jakarta apache"^4 "jakarta lucene"
  could be
"IBM"^4 "jakarta lucene"

Thanks,
William.

>From: Peter Carlson <[EMAIL PROTECTED]>
>Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
>To: Lucene Users List <[EMAIL PROTECTED]>
>CC: Lucene Developers List <[EMAIL PROTECTED]>
>Subject: Query Parser Syntax documentation now available
>Date: Wed, 15 May 2002 22:22:47 -0700
>
>Lucene supports creating your own query syntax, but also provides a default
>QueryParser implementation using JavaCC to parse query strings into Lucene
>Query objects.
>
>In hopes to provide some better understanding, there is now a Query Parser
>Syntax document available which describes the features of this
>implementation and some examples.
>
>http://jakarta.apache.org/lucene/docs/queryparsersyntax.html
>
>It is also located in the resources menu on the Lucene web site.
>
>I hope this proves helpful.
>
>--Peter
>
>
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Lucene Book

[William W]

Hi All,
Do you know some book about Lucene ?
Thanks,
William.

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Re: Retrieve all documents from Index, How to?

[William W]

Hi One,
Try to do something like this

doc.add(Field.Text("type","product"));

for all records.

Then search for type:product
It will return all the records.
William.


>From: "Tihon One" <[EMAIL PROTECTED]>
>Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Retrieve all documents from Index, How to?
>Date: Wed, 27 Mar 2002 16:05:16 +
>
>Hi all,
>
>I indexed all records in DataBase.  One of the field in my index stores
>primary key from DataBase (each key is in different document). Is there a
>way that I can retrieve all documents from index ?  I need to validate if
>all records is indexed.
>
>I try search for * but it return empty result.
>
>I'm using StandardAnalyzer with Field.KeyWord for the PrimayKey field and
>everything else is Field.Text
>
>Thanks for your help.
>
>TihonOne
>
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Re: Accessing the "contents" field

[William W]

Hi Roshan,
You only will have the contents in a field if you add it.
Ex.:
doc.add(Field.Text("contents", "My text"));

"contents" is not a default name.
William.

>From: "ROSHAN NAVENDRA" <[EMAIL PROTECTED]>
>Reply-To: "Lucene Users List" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: Accessing the "contents" field
>Date: Thu, 14 Mar 2002 14:36:53 +1000
>
>Hi,
>
>I would like to access the contents field of a document, fo rexample
>
>doc(i).get("contents")
>
>this should return a String (am i right?) but when I print it out I find 
>that it is a Null. How do I go about accessing the contents of the file
>
>Rosh.
>
>
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