On 14/05/14 21:49, Cindy A McMullen wrote:
Correction inline in bold below:
Not in plain text :-)
On May 14, 2014, at 2:15 PM, Cindy A McMullen wrote:
Hi,
I'm using Jena 11.2.1. My graph has a triple that looks like this:
{s=http://www.oracle.com/osn/osn.owl#User100,
p=http://www.oracle.com/osn/osn.owl#name,
o=Cindy^^http://www.w3.org/2001/XMLSchema#string}
I want to use DELETE DATA, and my update stanza looks like this:
PREFIX w: <http://www.foo.com/osn/osn.owl#>
PREFIX w: <http://www.oracle.com/osn/osn.owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
DELETE DATA { w:User100 w:name "Cindy" . }
That triple is not removed from the graph. So that's the first problem.
Because
"Cindy" != "Cindy"^^xsd:string
as RDF terms.
In RDF 1.1
"Cindy" and "Cindy"^^xsd:string are the same thing (not even equal -
they are two ways to write the same thing).
But to make that change, every persistent database needs reloading which
is a major change and needs careful migration. It is not yet done so
for this point (and the related rdf:langString) only it's RDF 1.0 semantics.
The next problem is that when I insert data into the graph, the XSD type
information is lost:
PREFIX w: <http://www.foo.com/osn/osn.owl#>
PREFIX w: <http://www.oracle.com/osn/osn.owl#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
INSERT DATA { w:User100 w:name "Charles" . }
{s=http://www.oracle.com/osn/osn.owl#User100,
p=http://www.oracle.com/osn/osn.owl#name, o=Charles}
When trying something like this:
// Throws parse errors
DELETE DATA { w:User100 w:name Cindy^^http://www.w3.org/2001/XMLSchema#string .
}
Full syntax is:
"Cindy"^^<http://www.w3.org/2001/XMLSchema#string>
How can I get INSERT DATA and DELETE DATA to work with literals?
Thanks -
-- Cindy
