stardog-groovy insert and query question

[Daniel Stieglitz]

Hi folks, and specifically Al,

I'm trying to do a simple insert/query using Stardog groovy and I can't seem to get the data specified correctly. For example:

stardog.insert(["<http://www.stainlesscode.com/rdfbb#Washington_Nationals>","<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>","<http://www.stainlesscode.com/rdfbb#Team>"])

followed by

stardog.query("PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX rdfbb: <http://www.stainlesscode.com/rdfbb#>

select ?x WHERE { ?x a rdfbb:Team. }", { println it })

returns nothing.

Am I data-typing something incorrectly here? Do I need to use ValueFactoryImpl to create the object reference?

Dan

[Stephen Nowell]

Hi Dan,

When performing an insert with Stardog Groovy, the < > characters are
not needed to denote a URI. In fact, for the subject and predicate, it
is assumed that the string being passed in represents a URI. In the
case of the object, it will assume it it being given a literal unless
you denote a URI by passing in a java.net.URI. The following insert
should give you the results you want:

stardog.insert(["http://www.stainlesscode.com/rdfbb#Washington_Nationals",
"http://www.w3.org/1999/02/22-rdf-syntax-ns#type", new
java.net.URI("http://www.stainlesscode.com/rdfbb#Team")])

Hope this helps!
-Stephen

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[Daniel Stieglitz]

Yes, that helped a lot, thanks Stephen.

As an aside, you can convert Strings to URIs using the shortcut

"http://www.stainlesscode.com/rdfbb#Team".toURI()