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Search found 135 results on 6 pages for 'rdf'.

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• RDF correct approach to subClassOf

  - by Macarse

  I am learning RDF. What's the difference between this two approaches: a) <?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:tur="http://www.blah.com/turismo#"> <rdf:Description…

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• Extracting URIs from RDF web page in Java using Jena Library

  - by Prannoy Mittal

  I have written following code for extratcting URIs from a web page with content type application/rdf-xml for Linked Data application. public static void test(String url) { try { Model read = ModelFactory.createDefaultModel().read(url); System.out.println("to go"); StmtIterator si; …

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• How to access members of an rdf list with rdflib (or plain sparql)

  - by tjb

  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 helper library). I'm trying to access the authors of a particular journal article in rdf produced by Zotero (some fields…

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• Parse RDF XML file to get all rdf:about values

  - by David

  I am using php's simple xml and xpath to parse an rdf xml file and am struggling to get a list of all the rdf:about values. Any advice?

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• Explaining the difference between OData & RDF by way of analogy

  - by jamiet

  A couple of months back I wrote a blog post entitled Microsoft, OData and RDF where I gave a high level view of the OData protocol and how it compares to RDF. I talked about linked data, triples and such like which may have been somewhat useful however jargon-heavy. Earlier today Dr Michael Hausenblas (blog |…

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• Popularity of RDF format vs RSS

  - by frankadelic

  If you are building an RSS parser, how important is it to build support for RDF? Are any new feeds being published in only RDF? My thinking was that RSS 2.0 (and Atom) have replaced RDF. I actually had not heard of RDF until a client pointed out some feeds that are RDF-only.

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• Which to use, XMP or RDF?

  - by zotty

  What's the difference between RDF and XMP? From what I can tell, XMP is derived from RDF... so what does it offer that RDF doesn't? My particular situation is this: I've got some images which need tagging with details of how an experiment was performed, and what sort of data analysis has been performed on…

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• XML/RDF to Java Objects with XSD

  - by bmucklow

  So here's the scenario...I have an XSD file describing all the objects that I need. I can create the objects in Java using JAXB no problem. I have an XML/RDF file that I need to parse into those objects. What is the EASIEST way to do this? I have been looking into Jena and have played around with it, but…

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• RDF Usage Rates for Syndication

  - by David in Dakota

  Is RDF still used widely for content syndication? Specifically, I know only of Slashdot as a large scale website syndicating content in that format (say versus RSS). Understandably this might seem vague to answer so more specifically: Can anyone list any larger sites similar in scale to Amazon or CNN…

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• SO what RDF database do i use?

  - by keisimone

  Hi, i have a similar issue as espoused in http://stackoverflow.com/questions/695752/product-table-many-kinds-of-product-each-product-has-many-parameters i am convinced to use RDF now. but i already have a database in mysql and the code is in php. 1) So what RDF database should I use? 2) do i…

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• How can one extract rdf:about or rdf:ID properties from triples using SPARQL?

  - by lennyks

  It seemed a trivial matter at the beginning but so far I have not managed to get the unique identifier for a given resource using SPARQL. What I mean is given, e.g., rdf:Description rdf:about="http://..." and then some properties identifying this resource, what I want to do is to first find this…

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• The State of RDF in Ruby

  - by Daniel

  I'm wondering about the current support there is in Ruby for semantic web technologies. Is there good RDF options? It seems that the last surveys done were circa 2007 ( http://paul-classic.stadig.name/2007/10/26/the-state-of-rdf-support-in-ruby-2007/ ). Is Redland's RDF wrappers the best way…

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• Reading Ontology with Jena, feeding it with RDF triples, and producing correct RDF string output.

  - by JonB

  Hi, I have an ontology, which I read in with Jena to help me scrape some RDFa triples from a website. I don't currently store these triples in a Jena model, but that is fairly straight forward to do, its on my to do next list. The area I am struggling with, though, is to get Jena to output…

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• How can one extract rdf:about or rdf:ID properties from triples using SPARKQL?

  - by lennyks

  It seemed a trivial matter at the beginning but so far I had not managed to get unique identifier for a given resource using SPARKQL. What I mean is given, let say, rdf:Description rdf:about="http://..." and then some properties identifying this resource, what I want to do is to first find…

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• Reading multiple instances of a tag or element using XSLT

  - by shashank saket

  My RDF xml file is something like this.. <rdf:RDF> <rdf:Description rdf:about="........"> <j.0:property rdf:resource="....."/> <j.0:property rdf:resource=....."/> <j.0:property rdf:resource="........"/> </rdf:Description>…

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• What is the difference between RDF and OWL?

  - by vicky21

  I am trying to grasp the concept of Semantic Web. I am finding it hard to understand what exactly is the difference between RDF and OWL. Is OWL an extension of RDF or these two are totally different technologies?

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• OpenCalais Parse RDF in .NET

  - by Erika

  is there a way to parse OpenCalais RDF in .NET as i'm using dotnetRDF and it keeps giving me errors. A sample of the Rdf generated may be found in http://viewer.opencalais.com/ , i'm honestly really lost and would really appreciate any help! please help if you use any other apis or know…

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• Parsing an RDF file in python

  - by Hossein

  Hi, Does anyone know how to pars RDF file in Python to get all the values within a specific tag? thanks

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• Versioned RDF store

  - by Mat

  Let me try rephrasing this: I am looking for a robust RDF store or library with the following features: Named graphs, or some other form of reification. Version tracking (probably at the named graph level). Privacy between groups of users, either at named graph or triple level.…

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• RDF of sentences

  - by Lily

  Hi, I need to classify sentences as a RDF format. In other words "John likes coke" would be automatically represented as Subject : John Predicate : Likes Object : Coke does nyone know where I should start? Are there any programs which can do this automatically or would I need…

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• RDF/XML format to JSON

  - by AlgoMan

  I am trying to convert the RDF/XML format to JSON format. Is there any python (library) example that i can look into for this to do ?

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• How can one extra rdf:about or rdf:ID properties from triples using SPARKQL?

  - by lennyks

  It seemed a trivial matter at the beginning but so far I had not managed to get unique identifier for a given resource using SPARKQL. What I mean is given and then some properties identifiying this resource in perfect world I want to first know how to retrieve an individual…

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• RDF-raptor-parser

  - by naveen

  Hi All, I am trying to parse the rdf file but I am getting error while executing following code in ubuntu RDF::Reader.open("http://datagraph.org/jhacker/foaf.rdf") do |reader| reader.each_statement do |statement| puts statement.inspect end end as LoadError: Could not…

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• How to write an RDF Schema?

  - by trickdev

  I am trying to get my head around using RDF to describe custom resources. I understand there are xmlns' out there such as Dublin Core and foaf which provide predefined element sets. How do I go about creating my own? I may be barking up the wrong tree of course and…

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• Best approach to convert XML to RDF/XML using an ontology

  - by krisvandenbergh

  I have an XML which uses the XPDL standard (which has an XML schema). What I'm trying to do now is to convert its content to RDF format (serialized in XML), in terms of a certain ontology. Clearly, there needs to be some sort of mapping here. I would like to do this…

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