I've studied SPARQL specification on the topic and also found this answer rather interesting. However definitions are complicated enough, so I still don't see the answer for my question. I can't f...

I just started learning about RDF and my question is: What is the purpose of the blank node? Example: ex:John foaf:knows _:p1 _:p1 foaf:birthDate 04-21 This means that John knows someone who is...

I am using RDFLib to query on the Semantic Dicom Ontology. I am querying for owl:Class in the graph constructed from the above ontology. RDFLib returns results which contain blank nodes and I wish ...

I'm looking for a turtle syntax for calling the anonymous node who call an other anonymous node. For example, I want to reproduce this code : :Instance0 a Class0; :property0 :Instance1. :Instan...

There is probably an easy to answer to this, but I can't even figure out how to formulate the Google query to find it. I'm writing SPARQL construct queries against a dataset that includes blank no...

I read this blog article, Problems of the RDF model: Blank Nodes, and there's mentioned that using blank nodes can complicate the handling of data. Can you give me an example why using blank nodes...

I've been testing Sesame 2.7.2 and I got a big surprise when faced to the fact that DESCRIBE queries do not include blank nodes closure [EDIT: the right term for this is CBD for concise bounded des...

Consider the following instance of SomeClass: instances:some_thing1 a semapi:SomeClass ; semapi:hasChainTo ( [ ... ] [ ... ] [ ... ] ) . I need every instance (some_thing2, some_thing3, etc...