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Posted to issues@jena.apache.org by "maltzinger (via GitHub)" <gi...@apache.org> on 2026/04/27 11:20:42 UTC
[I] Deleting RDF-star statements is not Working [jena]
maltzinger opened a new issue, #3883:
URL: https://github.com/apache/jena/issues/3883
### Version
6.0.0
### What happened?
Minimal (not) working example:
Entering [exemplary DELETE DATA statement](https://w3c.github.io/rdf-star/cg-spec/editors_draft.html#example-30):
```
PREFIX : <http://www.example.org/>
DELETE DATA {
:alice :claims << :bob :age 23 >> .
}
```
via the Web-UI and the `/update` SPARQL-Endpoint.
Expected Behaviour:
Return a successful update message (even if the statement was not in the graph, as per the community spec)
Actual Behaviour:
Get the error message `Line 4, column 18: Blank nodes not allowed in DELETE templates`.
### Relevant output and stacktrace
```shell
```
### Are you interested in making a pull request?
None
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Re: [I] Deleting RDF-star statements is not Working [jena]
Posted by "afs (via GitHub)" <gi...@apache.org>.
afs commented on issue #3883:
URL: https://github.com/apache/jena/issues/3883#issuecomment-4326786553
Jena support RDF 1.2
In RDF-star, `<<>>` was a kind of RDF term but was often used as an occurrence, not as a triple term.
In RDF 1.2 `<< :s :p :o >>` is a Turtle syntax form equivalent form (c.f. lists) for an occurrence and the triple term is `<<( ... )>>`
```turtle
:alice :claims << :bob :age 23 >> .
```
becomes the triples
```turtle
:alice :claims _:b .
_:b rdf:reifies <<( :bob :age 23 )>> .
```
That is where the blank node is coming from.
You use use a variable to find the blank node
```sparql
DELETE WHERE { :alice :claims << :bob :age 23 ~ ?R >> }
```
or give URIs to reifications in the data.
```turtle
:alice :claims << :bob :age 23 ~ :r >> .
:alice :claims :r .
:r rdf:reifies <<( :bob :age 23 )>> .
```
```sparql
DELETE DATA { :alice :claims << :bob :age 23 ~:r >> . }
```
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Re: [I] Deleting RDF-star statements is not Working [jena]
Posted by "maltzinger (via GitHub)" <gi...@apache.org>.
maltzinger commented on issue #3883:
URL: https://github.com/apache/jena/issues/3883#issuecomment-4333793073
Thank you for your quick response! With the snippets you supplied, it worked like a charm.
That Jena supports RDF 1.2 instead of RDF-star was not clear to me, as it is stated in an unclear manner on different [pages](https://jena.apache.org/documentation/fuseki2/rdf-sparql-standards.html) of their [website](https://jena.apache.org/documentation/rdf-star/).
I apologise for my lack of research and thank you for your knowledge!
I will close this issue, then.
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Re: [I] Deleting RDF-star statements is not Working [jena]
Posted by "maltzinger (via GitHub)" <gi...@apache.org>.
maltzinger closed issue #3883: Deleting RDF-star statements is not Working
URL: https://github.com/apache/jena/issues/3883
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