CODEWITHSUNDEEP
pythonsparqlrdflib
Julius Sechang Mboli
Julius Sechang Mboli

Reputation: 60

How to run a SPARQL update statement using RDFLIB in python

I know there is an update statement in SPARQL, but I am not really sure how to use it in RDFLIB. For instance, I have an ontology that contains Alice and Julius as individuals and I want to run a SPARQL update to change their properties. This includes things like updating their ages, likes, hobbies, etc.

I also want to be able to add individuals and their properties if they do not exist in the ontology. Example, adding John, his age, likes, hobbies, etc.

Upvotes: 0

Views: 389

Answers (2)

Diyar
Diyar

Reputation: 11

As pointed out in Nicholas Car's answer, you can use g.update(<SPARQL Update Statement>) to update the graph using SPARQL.

You can also use g.set((<Subject>, <Predicate>, <Object>)) to update the graph using triplets. This will replace the existing triplets with the new triplet.

Lastly, if the goal is simply to add a new triplet, g.add((<Subject>, <Predicate>, <Object>)) allows you to add a new entry from a triplet. Note, however, that this does not replace existing values.

Upvotes: 0

Nicholas Car
Nicholas Car

Reputation: 1251

I'm just adding UninformedUser's comment here in a response so this can be accepted.

You do just use g.update(queryString), see the documentation here:

https://rdflib.readthedocs.io/en/latest/intro_to_sparql.html#update-queries

Upvotes: 1

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