Yes, this is the expected behavior. If you just say DELETE { ?a ?b ?c } then
the system will apply those changes to the default graph, which is the base
model of the currently open file (without imports). In order to delete data
from subgraphs, you need to explicitly mention those. In SPARQL 1.1 and TBC 3.5
the syntax for that would be
DELETE {
GRAPH <http://example.org/myimportedgraph> {
?a ?b ?c
}
}
or in SPARQL 1.0 it was DELETE FROM <...>. And the Change History may report
them because this is how Jena reports changes to the graphs (even if no delete
has happened).
Holger
On May 21, 2011, at 7:02 AM, Li, Naicong wrote:
> Thanks for your reply!
>
> Now another related question. I have a set of related ontologies each
> residing in a separate n3 file. When I do a DELETE query, it seems that only
> the matching triples in the currently active n3 file get deleted, even though
> the Change History reports that all the matching triples in all the n3 files
> were deleted. Is this an expected behavior?
>
> Thanks.
> Naicong
>
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Holger Knublauch
> Sent: Thursday, May 19, 2011 3:21 PM
> To: [email protected]
> Subject: Re: [topbraid-users] Question about DELETE
>
> Naicong,
>
> yes this is a known buglet. The underlying issue is that in the Jena API,
> Update queries go through a different factory than the queries, and if one of
> them fails then it's hard to guess which one the user is trying to enter -
> both throw parsing exceptions.
>
> Thanks,
> Holger
>
>
> On May 20, 2011, at 7:56 AM, Li, Naicong wrote:
>
>
> By the way, when you enter a query starting with DELETE, the first message
> you saw on the bottom status bar says: <image001.png>
>
> Which could be misleading.
>
> Naicong
>
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Li, Naicong
> Sent: Thursday, May 19, 2011 2:51 PM
> To: [email protected]
> Subject: RE: [topbraid-users] Question about DELETE
>
> Thanks!
> Naicong
>
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Gokhan Soydan
> Sent: Thursday, May 19, 2011 2:48 PM
> To: [email protected]
> Subject: Re: [topbraid-users] Question about DELETE
>
> Naicong,
>
> You also have to bind the ?label variable in the WHERE clause. So it should
> look like:
>
> DELETE {
> ?I rdfs:label ?label .
> }
> WHERE {
> ?I a ZTest:C1 .
> ?l rdfs:label ?label .
> }
>
>
> Gokhan
>
>
> On 5/19/2011 2:42 PM, Li, Naicong wrote:
> Hi,
>
> I have a question about using DELETE in a SPARQL query. I have a test class
> ZTest:C1, which has an instance ZTest:C1_1, whose rdfs:label = “C1 1”. I
> entered the following query in the SPARQL query window to test deleting the
> triple: ZTest:C1_1 rdfs:label “C1 1” :
>
> DELETE {
> ?I rdfs:label ?label .
> }
> WHERE {
> ?I a ZTest:C1 .
> }
>
> The query passed syntax checking, and executed, but it did not delete the
> rdfs:label triple for ZTest:C1_1 .
>
> Am I doing something wrong? I am using TopBraid ME 3.3.2.
>
> Thanks for your help.
> Naicong
>
>
>
>
>
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