Re: Jena text Search

[Andy Seaborne]

On 19/01/15 22:33, Kamalraj Jairam wrote:
Hello All,
I have number of data properties in TDB dataset with ranging Uris

I want to create a lucene index on these data properties so that any partial 
text search is fast.

I read the document on Jena Website, but i have some questions on what needs to 
be done

This is what the text says

// Example of building a text dataset with code.

     // Example is in-memory.
     // Base dataset
     Dataset ds1 = DatasetFactory.createMem() ;

     EntityDefinition entDef = new EntityDefinition("uri", "text", RDFS.label) ;

     // Lucene, in memory.
     Directory dir =  new RAMDirectory();

     // Join together into a dataset
     Dataset ds = TextDatasetFactory.createLucene(ds1, dir, entDef) ;

What should go in the Uri - > is it the base Uri?

What should go in the “Text” ? can this be left blank?

The "uri" is the target (result) of the search.

That EntityDefinition says to use the Lucene field "text" for the 
indexed strings of rdf:label statements.

It will look up "text" and return "uri".

        Andy


Thanks
Kamalraj