Hello. I'm having difficulty structuring a SPARQL query for the Project Gutenberg catalog (available at Gutenberg Feeds toward the bottom of the page). I know it is a fundamental lack of understanding on my part of how SparQL/RDF/etc. actually work, conflating it with SQL, etc. But I've tried several tutorials, and I just can't quite ...
Are there any tools available for generating RDF from natural language? A list of RDFizers compiled by the SIMILE project only mentions one, the Monrai Cypher. Unfortunately, it seems to have been a proprietary tool developed by Monrai Technologies, which has since disappeared, and I can't find any download links. Has anyone seen anythin...
Hi, I have an ontology file (in RDF) which expresses the entities in the app that I am writing. I am using Jena, and can access the Concepts and create/access the resources by directly manipulating triples. To make things easier, I created a set of Java classes, one for each type of resource in my ontology, keeping in mind their inherit...
How much of the concepts conveyed in natural language is RDF/OWL able to represent? I'm still learning RDF and other semantic technologies, but as I currently understand it, information is typically represented as triples of the form (subject,predicate,object). So I can imagine how the sentence "Bob has a hat" might be represented. Howev...
I have looked at Elmo from openrdf.org, but it doesn't seem to support having object within another object. E.g. Class Roof within the Class House and then allow persisting House object. Is there any other fairly mature and better documented persistence framework out there for RDF/OWL data that will allow such operations? Or if not, i...
With Protege I made an ontology that has some classes and instances. Class "Knowledge" has a property "hasSubKnowledge" which domain and range are both of type "Knowledge". I have around 200 individuals of type "Knowledge". I made a JSP and my job is to somehow graphically represent my "Knowledge" tree (RDF). Is it possible that ontolog...
I run on Mac OS X 10.5 and I want to write a program in Perl. However, I need to install the module RDF::Trine and DBD::CSV and I got an error when I install both. If I write : install RDF::Trine The error is : Files=51, Tests=5, 2 wallclock secs ( 0.21 usr 0.18 sys + 1.30 cusr 0.51 csys = 2.20 CPU) Result: FAIL Failed 49/51 t...
On .NET platform: Has any body used RDFS Validation for CIM RDF/XML Files? Has anybody used RDFS Validation for RDF/XML Files? ...
I am trying to query AllegroGraph 4.0 using roqet to extract data in CSV. Is it possible? In roqet man page it is not clear if it can query a triple store besides rdf files. About AG HTTP protocol: http://www.franz.com/agraph/support/documentation/v4/http-protocol.html#header2-270 About roqet: http://librdf.org/rasqal/roqet.html Hello...
This web application is about posting different kind of posts to the web application where users can search those posts by a text-based search. Basically a post has following attributes. Title Description Category Budget Submit_date End_date Currently, Post content is store in sql server database under 'Post' table....
I've been using OpenLink Virtuoso as an RDF store for some time now and although it's great with large data, I'm not satisfied with the graph traversal performance using SPARQL. Recently I've heard a lot about Neo4j's traversal performance and thought it's worth a try. So, for the purpose of having a large RDF store with good traversal ...
Hi everyone, I need to load very large ontology represented as N-triples file(1gb) to the openrdf Sesame application. I'm using the workbench interface to do that. I know that this file is too big to be loaded in one request. To get around that, I splitted my files in files of size 100mb. But I still get a error form the openrdf Sesam...
I'm trying to encode some botanical data in Turtle format, and read this data from Python using RDFLib. However, I'm having trouble, and I'm not sure if it's because my Turtle is malformed or I'm misusing RDFLib. My test data is: @PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @PREFIX rdfs: <http://www.w3.org/2000/01/rd...
I've been looking at the resources definition of the Change Management module of the OSLC. Why using RDF? Is this use related to semantic Web services? Thanks ...
i want to record anonymous users 'liking' records: user:1 vocab:likes record:123234 . user:2 vocab:likes record:124534 . is there a way to add incremental values in rdf/turtle without explicitly stating them? thanks :) ...
so, if the data set is: @prefix dc: <http://purl.org/dc/elements/1.1/> . @prefix : <http://example.org/book/> . @prefix ns: <http://example.org/ns#> . :book1 dc:title "SPARQL Tutorial" . :book2 dc:title "The Semantic Web" . how do i check that the triple :book1 dc:title "SPARQL Tutorial" . exists? i can do SEL...
I want to run some analysis on networked data having multiple modes(i.e. multiple types of network nodes) and multiplex relations(i.e. multiples types of network edges). The analysis is probably about SNA or applying any algorithm from graph theory, e.g. tie strength, centrality, betweenness, node distance, block, cluster, etc. The sou...
from rdf file http://www.blackberry.net/go/mobile/profiles/uaprof/9530/4.7.0.rdf how do we know that device is a touch screen device? ...
in RDF a statement is represented with S,P and O; In OWL the owl:ObjectProperty represents the predicate logic. (S) (P) (O) I like dog <owl:Class rdf:about="Person" /> <owl:NamedIndividual rdf:about="I"> <rdf:type rdf:resource="Person"/> <like rdf:resource="Dog"/> </owl:NamedIndividual> <owl:Class rdf:about="Pet" /> <ow...
I have successfully installed Openrdf Repository (sesame 2.3.2) and Openrdf workbench however I do not know how to set up a user and a password to protect Openrdf workbench. I suppose that there is --somewhere -- a configuration file. Can somebody give me a hint how to create a user and set up a password for openrdf workbench? ...