Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread xing jiang
On 1/20/06, Klaus <[EMAIL PROTECTED]> wrote: > > Hi, > > >Actually, my problem is that, for instance, for a document d, Its feature > >vector may be keywords and concepts. > > What do you exactly mean by features vector? You are referring to the > predicate - object pairs, connected to one subject

Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread xing jiang
On 1/19/06, Mathias Lux <[EMAIL PROTECTED]> wrote: > > > > Actually, my problem is that, for instance, for a document d, > > Its feature > > vector may be keywords and concepts. I don't know how to > > weight the two > > items. Right now, i used a stupid method, given a document d, > > i can obtain

Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread xing jiang
On 1/19/06, Mathias Lux <[EMAIL PROTECTED]> wrote: > > > > > -Ursprüngliche Nachricht- > > Von: xing jiang [mailto:[EMAIL PROTECTED] > > Gesendet: Donnerstag, 19. Jänner 2006 13:11 > > An: java-user@lucene.apache.org > > Betreff: Re: Use

Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread xing jiang
prüngliche Nachricht- > > Von: xing jiang [mailto:[EMAIL PROTECTED] > > Gesendet: Donnerstag, 19. Jänner 2006 12:14 > > An: java-user@lucene.apache.org > > Betreff: Re: Use the lucene for searching in the Semantic Web. > > > > Hi Mathias, > > > &g

Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread xing jiang
Hi Mathias, Can you give more details? Is your application for text + ontology, or ontology only? regards jiang xing On 1/19/06, Mathias Lux <[EMAIL PROTECTED]> wrote: > > Hi! > > (1) I'm working on a similar problem, but based on MPEG-7 Semantic > Description Graphs. I've already a prototype

Re: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread Erik Hatcher
For some semweb + full-text searching real-world examples, also look to the SIMILE project - http://simile.mit.edu/ They have integrated Lucene into PiggyBank and Longwell. Erik On Jan 18, 2006, at 9:30 PM, xing jiang wrote: Hi, I have done some surveys about the information retr

RE: Use the lucene for searching in the Semantic Web.

2006-01-19 Thread Mathias Lux
Hi! (1) I'm working on a similar problem, but based on MPEG-7 Semantic Description Graphs. I've already a prototype for pakth based matching within Lucene integrated in my sf project Caliph & Emir (http://caliph-emir.sf.net). I've already adapted the approach to an ontology, which had to be search

Re: Use the lucene for searching in the Semantic Web.

2006-01-18 Thread xing jiang
Hi, I have done some surveys about the information retrieval on the Semantic Web, (maybe i miss many papers, most papers i used are published in recent WWW and CIKM conferences, :). 1. A typical way of using the ontology is to select exact term from the domain ontology to form queries. The first

Re: Use the lucene for searching in the Semantic Web.

2006-01-18 Thread Erik Hatcher
On Jan 17, 2006, at 12:25 PM, jason wrote: I think the Kowari is a system for searching information in the RDF files. It is only for finding information in the meta data files. However, i think one problem of the Semantic Web is that, if we have a document and its RDF annotate, how do we re

Re: Use the lucene for searching in the Semantic Web.

2006-01-18 Thread adasal
Presumably because this is the way of formulating an inductive statement. Just entering key words doesn't introduce the notion of a relationship between some known and some other unknown terms. > Queries match graph patterns against the target graph of the query. From http://www.w3.org/TR/2004/W

Re: Use the lucene for searching in the Semantic Web.

2006-01-17 Thread xing jiang
Hi, I think one problem of the existing method is that, to query on the RDF files or similar structures, we have to form SQL like queries. However, for searching in the text files, we only need to type several keywords. Can we combine the two methods and how can we combine the two methods. For ins

Re: Use the lucene for searching in the Semantic Web.

2006-01-17 Thread jason
hi Erik, thx for your reply. I think the Kowari is a system for searching information in the RDF files. It is only for finding information in the meta data files. However, i think one problem of the Semantic Web is that, if we have a document and its RDF annotate, how do we retrieve the documents

Re: Use the lucene for searching in the Semantic Web.

2006-01-17 Thread Erik Hatcher
Have a look at Kowari - http://www.kowari.org It is a scalable RDF engine that also has full-text search support via Lucene. Professionally I tinker with semweb and search topics, and eventually we'll have something to show for these efforts :) Erik On Jan 17, 2006, at 9:34 AM,