Nov 7, 2008 · An RDF file should parse down to a list of triples. A triple consists of a subject, a predicate, and an object. But what do these actually mean? The subject is, well, the subject. It identifies what object the triple is describing. The predicate defines the piece of data in the object we are giving a value to. The object is the actual value.

Feb 17, 2022 · The order of RDF predicates is not meaningful. If RDFlib chooses alphabetical order for the serialization, just roll with it. For actual query results (with SPARQL), you can add an ORDER BY term to control the order; but those are tabular data, not triples. In RDF, the subject and predicate of triples should be a URI.

Mar 2, 2018 · When building a knowledge graph, the first step (if I understand it correctly), is to collect structured data, mainly RDF triples written by using some ontology, for example, Schema.org. Now, what ...

Oct 20, 2015 · Can you give a concrete example: some example RDF graph, and what you'd like to be able to query from that RDF graph? As-is, the question is rather too broad and vague to answer.

Jan 9, 2014 · I want to create "RDF triple" by taking "text file/document" as an input. It means a tool like portege-OWL, which will convert Text file into RDF triple. And may I know the steps how to do this. And

Feb 5, 2022 · RDF Serialisations RDF can be exported in a number of file formats. The most common is RDF+XML but this has some weaknesses. N3 is a non-XML format which is easier to read, and there's some subsets (Turtle and N-Triples) which are stricter. It's important to know that RDF is a way of working with triples, NOT the file formats. XSD

Apr 10, 2020 · However I can't see a link between the blank node and how the range constraint could be enforced/resolved. Is it easy to explain on a conceptual level how blank nodes are used in terms of resolving specified triples? I'm very, very new to the world of Linked Data. Please let me know how this question could be improved on!

May 11, 2015 · "triple stores store nothing but triples" Many (most?) triple stores (i.e., for RDF) are actually quad stores, since they have a concept (from SPARQL datasets) of named graphs. Since each triple exists within a graph, the fundamental item is actually (graph,subject,predicate,object).

Aug 30, 2019 · Having just started out in RDF and ontology, mainly in converting unstructured text to RDF (maybe manually), I found many examples for converting simple sentences to RDF triples 1 2 3, but not much...

Mar 6, 2022 · For learning SPARQL it might be useful to have full control both over the query text and the data (RDF triples). While there are many public SPARQL endpoints available their data is typically read-...