CODEWITHSUNDEEP
rdfrdflibn-triplesiri
swathi selvaraju
swathi selvaraju

Reputation: 81

Use of IRI in RDF N-Triples

I am trying to convert a csv file into RDF N-triples using RDFLib in python. It seems that subject must be an IRI/blank node and also Predicate must be an IRI. For example,

<http://example.org/show/218> <http://www.w3.org/2000/01/rdf-schema#label> "That Seventies Show" .

I have only static string literal data in csv file and I don't have any IRI. For example, subject: "Name" predicate: "Id" Object="Location".

updated the csv format as below,

Name Id Location
Jon 34 Texas
Michael 42 California

So, is it possible to use only string literal for subject and predicate ? or How to build the IRI for my data?

Upvotes: 2

Views: 643

Answers (1)

Thomas
Thomas

Reputation: 1020

You're correct when you state that you must have a URI as the subject. This is a major feature of the technology that allows you to link data together.

You also need to have a namespace for the predicates. This is another feature of the technology that you won't be able to get around.

If you want the name as the subject I would do something like...

subject = rdflib.URIRef('http://ex.com/name')
predicate = rdflib.URIRef('http://ex.com/hasID')
object = rdflib.Literal(id)
graph.add((subject, predicate, object))

where name and id are coming from your CSV.

You might want to add an rdfs:label to the node for parsing/readability. A better option in my opinion is to create a new relation, ex:hasName and relate the name to the node that way.

tldr

Use an existing URI scheme (file://, http://, uuid:, etc) and append something to the end that makes the most sense.

Upvotes: 1

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