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

2006-01-20 Thread Klaus
>The feature vector may be bigger than the object-predicate pairs. In my >application, each document may be annotated with several concepts to say >this document contains an instance of a class. How do you do that? I have to reengineer the ontology in my application, but I'm not sure how to express

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

2006-01-19 Thread Klaus
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 node, don't you? >I don't know how to weight the two >ite

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

2006-01-19 Thread Mathias Lux
> 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 a > rank D based on keyword method. Also, it is annotated wit

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

2006-01-19 Thread Mathias Lux
> -Ursprüngliche Nachricht- > Von: xing jiang [mailto:[EMAIL PROTECTED] > Gesendet: Donnerstag, 19. Jänner 2006 13:11 > An: java-user@lucene.apache.org > Betreff: Re: Use the lucene for searching in the Semantic Web. > > Hi, > > I am not sure whether my understanding is correct. > >

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

2006-01-19 Thread Mathias Lux
Its for both, onto + contents (Word, Pdf, PPT, all time the same candidates). The main disadvantage of this approach is that "main" nodes in the ontology have to be defined. Imagine following use case: An ontology describes a companies content and knowledge management system. Persons, hierarc

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

2006-01-17 Thread Klaus
Hi Jiang, I'm currently facing a similar problem. Up to now I have to use for the semantic query a graph matching algorithm, but the fulltext search in the semantic web is performed by lucene. At first I wrote the whole text into a one index. The document contains one field for the unique id and