Hi,
Hi Rob,
We are running TDB-backed Fuseki started with an assembler file with
tdb:unionDefaultGraph set to true. There are two named graphs in our
dataset. If I want to delete an item from one of the graphs I can do so
using the WITH clause as in the following example...
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dri: <http://nationalarchives.gov.uk/terms/dri#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
WITH <http://nationalarchives.gov.uk/dri/catalogue>
DELETE
{
<http://nationalarchives.gov.uk/dri/catalogue/record-list/abc>
dri:recordListMember ?item .
}
WHERE
{
?item dcterms:identifier "123"^^xsd:string .
}
However I am sending my updates over HTTP using the SPAQRL Protocol and so
I would prefer not to use the WITH clause
What's the problem with using WITH?
but instead to use the
using-graph-uri parameter in my HTTP POST request.
It does something different - it sets the view of the dataset for the
WHERE part but it does not change the target (the DELETE template).
"""
The USING and USING NAMED clauses affect the RDF Dataset used while
evaluating the WHERE clause.
"""
My understanding from
the specs is that the following HTTP request should be equivalent but it
doesn't seem to be. Can anyone confirm if this should work? Although it
executes successfully (response 204) - the data is not deleted...
As Arthur suggests, you can use GRAPH:
WITH <foo>
DELETE { T } WHERE { P }
is the same as:
DELETE { GRAPH<foo> { T } } WHERE { GRAPH <foo> { P } }
POST
/catalogue/update?using-graph-uri=http%3A%2F%2Fnationalarchives.gov.uk%2Fdri%2Fcatalogue
HTTP/1.1
Host: localhost:3030
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120606
Firefox/10.0.5
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
Content-Type: application/sparql-update; charset=UTF-8
Content-Length: 557
Pragma: no-cache
Cache-Control: no-cache
PREFIX dcterms: <http://purl.org/dc/terms/>
PREFIX dri: <http://nationalarchives.gov.uk/terms/dri#>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
DELETE { <http://nationalarchives.gov.uk/dri/catalogue/record-list/abc>
dri:recordListMember ?item . }
WHERE { ?item dcterms:identifier "123"^^xsd:string . }
HTTP/1.1 204 No Content
Fuseki-Request-ID: 40
Access-Control-Allow-Origin: *
Server: Fuseki (1.0.2)
----------------------------------------------------------
Thanks
Rob
-- Rob Walpole Email [email protected] Tel. +44 (0)7969 869881 Skype:
RobertWalpolehttp://www.linkedin.com/in/robwalpole
