rdf Questions
2
Solved
In one of the samples for querying Wikidata, I found the following query, which includes p:P6/v:P6 in the line after SELECT. What does it mean?
PREFIX wd: <http://www.wikidata.org/entity/>
...
5
Solved
Let's say I make the following insertions into my GraphDB 8.3 triplestore:
PREFIX : <http://example.com/>
insert data { :hello a :word }
and
PREFIX : <http://example.com/>
insert da...
Lalitta asked 26/9, 2017 at 21:23
11
I'm looking for a tool that will render a RDF graph in a reasonably useful graphic format. The primary purpose of the graphic format being inclusion into a PowerPoint slide or printing on a large p...
Erb asked 15/9, 2008 at 20:40
2
Solved
I am modelling university data using an OWL ontology with relevant classes, object properties, etc. I have the university data lying in a simple text file (say CSV). I want to create ontologies usi...
Avaria asked 30/10, 2012 at 21:30
2
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I'm creating linked data of materials and their physical properties, and I'm having trouble with setting units for certain properties. My individual material :AlMg3 has some mechanical properties l...
Scauper asked 27/11, 2013 at 16:51
6
Solved
I was wondering if anyone knew of an application that would take a GEDCOM genealogy file and convert it to HTML format for viewing and publishing on the web. I'd like to have separate html files fo...
6
Solved
I've done a bit of searching around for a good RDF editor. But I'm not sure what one is the most utilised. Can anyone recommend one? I'm looking to write some simple RDF and maybe parse one o...
2
Solved
I know that I can represent any relation as a RDF triplet as in:
Barack Obama -> president of -> USA
(I am aware that this is not RDF, I am just illustrating)
But how do I add additional ...
Adrenalin asked 3/10, 2015 at 13:35
5
Solved
Neo4j is a really fast and scalable graph database, it seems that it can be used on business projects and it is free, too!
At the same time, there are no RDF triple stores that work well with larg...
3
Solved
Is there any publicly available (rdf) color ontology?
Thanks for any pointer.
Sanches asked 7/9, 2012 at 21:36
3
Solved
What is the best way to access the members of an rdf list? I'm using rdflib (python) but an answer given in plain SPARQL is also ok (this type of answer can be used through rdfextras, a rdflib help...
2
Solved
could you please explain me the difference between rdfs:domain and rdfs:range with an example? and when should i use domain and when range? i have read h w3c rdf primer but i did not understand the...
1
I have a large rdf file:
size: 470MB
number of lines: almost 6 million
unique triple subjects: about 650,000
triple amount: about 4,200,000
I loaded the rdf definition into the berkeley db bac...
3
How do I check and filter out empty strings using sparql.
3
I have a citation system which publishes users notes to a wiki (Researchr). Programmatically, I have access to the full BibTeX record of each entry, and I also display this on the individual pages ...
Biyearly asked 6/3, 2012 at 0:52
3
Solved
I am new to wikidata and I can't figure out when I should use -->
wdt prefix (http://www.wikidata.org/prop/direct/)
and when I should use -->
p prefix (http://www.wikidata.org/prop/).
in my s...
2
Solved
I am attempting to use a SPARQL Construct query to create a new named graph from an existing one. The database I am querying contains http://graph.com/old as an existing named graph. I am using Jen...
Amusing asked 20/8, 2013 at 22:21
3
Solved
I'm querying an OWL ontology using SPARQL, but the results show links as well as data. I only want the data. How can I remove the link and show on the data? The output I'm getting is:
------------...
Burdett asked 13/5, 2014 at 8:27
3
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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...
Upbuild asked 17/2, 2014 at 9:14
5
Solved
whenever I start using SQL I tend to throw a couple of exploratory statements at the database in order to understand what is available, and what form the data takes.
e.g.
show tables
describe tabl...
1
Solved
In the following minimal test case:
from rdflib import Graph, Namespace, Literal, RDF
base = "http://test.com/ns"
foobar = Namespace("http://test.com/ns#")
g = Graph(base=base)...
Elamitic asked 20/1, 2021 at 22:7
6
Solved
I'd like to parse a very large (about 200MB) RDF file in python. Should I be using sax or some other library? I'd appreciate some very basic code that I can build on, say to retrieve a tag.
Thanks...
2
I tried searching over the internet but could not find the right tool for the purpose, so if anyone could provide me a link to the tool which could parse and display a graph for RDF and OWL ontolog...
Keeney asked 16/4, 2017 at 2:27
4
Solved
I need to infer that one individual is the brother of other one if they have the same father.
So, if I have this:
Bart hasFather Homer.
Lisa hasFather Homer.
Because Bart and Lisa have the...
1
I'm interested in extracting triples (subject,predicate,object) from questions.
For example, I would like to transform the following question :
Who is the wife of the president of the US...
Tynishatynwald asked 13/10, 2014 at 16:45
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