Full Text Search syntax errors

[dlbis (Daniel Lavoie)]

Hi,

I have enabled full text search and was able to obtain some results. However, there are some parts of the Lucene syntax that are always giving me errors.

I am trying to test the Lucene syntax supported by Stardog as described in Home | Stardog Documentation Latest and org.apache.lucene.queryparser.classic (Lucene 5.3.0 API)

(1) The proximity syntax returns an error

select *
from tag:stardog:api:context:all
where {
(?text ?score) tag:stardog:api:property:textMatch ("semantic web"~5)
}
order by desc(?score) ?text

(2) The boolean operator syntax returns an error

select *
from tag:stardog:api:context:all
where {
(?text ?score) tag:stardog:api:property:textMatch ("jakarta apache" AND "Apache Lucene")
}
order by desc(?score) ?text

(3) The fuzzy syntax returns an error

select *
from tag:stardog:api:context:all
where {
(?text ?score) tag:stardog:api:property:textMatch ("semantic"~1 2.0 1) #
}
order by desc(?score) ?text

In fact, most of the Lucene syntax does not seem to be valid in Stardog Studio. Except the following in which I am including minimum score and limit.

select *
from tag:stardog:api:context:all
where {
(?text ?score) tag:stardog:api:property:textMatch ('CK Hutchison Holdings Ltd' 6.0 1)
}
order by desc(?score) ?text

What is the proper way to embed in SPARQL all the Lucene syntax?

Thanks

[zachary.whitley]

The Lucene syntax query needs to be contained within the quotes just to make it a valid sparql query but I'm not positive how you escape the quotes withing the query but I'm guessing it's something like the following.

(?text ?score) tag:stardog:api:property:textMatch ("semantic web"~5)

should be

(?text ?score) tag:stardog:api:property:textMatch ("\"semantic web\"~5")

[dlbis (Daniel Lavoie)]

Hi Zachary,

You are right. I am now getting some results. Thanks!

select *
from tag:stardog:api:context:all
where {
(?text ?score) tag:stardog:api:property:textMatch (""semantic web"~5")
}
order by desc(?score) ?text