On 20/06/2023 15:00, Ghinwa FAKIH wrote:
I hope this email finds you well. I'm writing to seek your assistance
regarding a programming task I'm working on, specifically related to
traversing nested triple patterns in SPARQL-star queries using the
Apache Jena framework. Recently, I executed a code snippet that
retrieves the query pattern from a SPARQL query using the Apache Jena
library. The code checks if the query pattern is a group (represented by
the ElementGroup class) and, if so, retrieves the individual elements of
the group. For each element, it prints a string representation of the
element using the toString() method.
Do you have an minimal, complete example?
However, when I ran the code, the output I received was in the format:
Element: << ?s ex:p1 ex:o1 >> ex:p2 ?o.
So what was the original query?
But this provides a partial view of the nested triple patterns, which
does not meet my requirements. I am particularly interested in obtaining
every individual triple or triple pattern within each level of nesting.
Unfortunately, the output includes incomplete elements, such as |ex:p2
?o|, which fails to capture the complete nested triple pattern.
I recognized that I need to use SPARQL-Star parser but in the github of
Apache jena, I can only find the SPARQL parser and not the SPARQL-Star
parser.
There isn't a separate parser. The default system has RDF-star support
(the CG report).
I would appreciate any help.
Thank you in advance
Kind Regards
