RDF

Great Reads

by Josef Hardi

This is the second article about Semantika. This article will detail the mapping modelling used in Semantika.

Representing Information Models as RDF and OWL Vocabularies

by Gerd Wagner

How to represent information models as RDF and OWL vocabularies, and how to embed simple meta-data statements (annotations) in web documents.

Semantic Database: Concept, Architecture and Implementation

by Marc Clifton

No word has a value that can be identified independently of what else is in its vicinity.

Introduction to Semantika DRM

by Josef Hardi

An introduction to the concept of Ontology-based Data Access and Semantika.

Latest Articles

Representing Information Models as RDF and OWL Vocabularies

by Gerd Wagner

How to represent information models as RDF and OWL vocabularies, and how to embed simple meta-data statements (annotations) in web documents.

Semantic Database: Concept, Architecture and Implementation

by Marc Clifton

No word has a value that can be identified independently of what else is in its vicinity.

Introduction to Semantika DRM

by Josef Hardi

An introduction to the concept of Ontology-based Data Access and Semantika.

Developing Semantika Client Application

by Josef Hardi

This is the third and final article about Semantika. This article will guide you to develop a simple "hello-world" query application

All Articles

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RDF

Relational to Domain Mapping Modelling

24 Jun 2014 by Josef Hardi

This is the second article about Semantika. This article will detail the mapping modelling used in Semantika.

Java

RDF

API

Problem in reading RDF url in C#

20 May 2015 by rukhs

i am trying to read triples of pizza ontology using uri http://www.dcs.bbk.ac.uk/~michael/sw/slides/pizza.owlcode is: private void button2_Click(object sender, EventArgs e) { try { IGraph g = new Graph(); UriLoader.Load(g,...

C#5.0

RDF

Search keyword from dbpedia using nodejs

29 Jan 2020 by Pete O'Hanlon

The URL you are looking for uses ?query= to specify the query. However, you are going to have to cope with the fact that the query format for Sparql is rather odd. Here's an example[^].

Javascript

Node.js

RDF

How to creadte a RDF Database and Storing values in that..

24 Jul 2011 by manjukgowda

Hi I want to know how to create an RDF Database and how to store values in this..Please tell me with a simple example if you know..With Regards.Manju K Gowda[edit]Spurious bold removed - OriginalGriff[/edit]

RDF

How to creadte a RDF Database and Storing values in that..

24 Jul 2011 by Prerak Patel

http://download.oracle.com/docs/cd/B19306_01/appdev.102/b19307/sdo_rdf_concepts.htm[^]

RDF

c# rdf-sparql . dotNetRDF. don't work

24 Jun 2013 by andr-ok

I have rdf file John Smith ...

RDF

search in rdf by index

26 Jun 2013 by Member 3369145

i want to search text in rdf by sparql query using index, the code is not showing error but returning no result, is should show the matched text.pls help ....................................................................//indexing// -- Read and index all literal...

Java

RDF

Need some references

25 Aug 2014 by laila797

Hello I am learning creating ontology in Protege and querying with sparql. I want to learn new techonologies for it like using it in visual studio.Can some one please help me by giving references to complete tutorials. Thanks

Visual-Studio

RDF

what is query of this sentence in SPARQL?

2 Feb 2015 by zahraf

Hi!what is query of this sentence in SPARQL?select all concepts(individual or class) that have a word like "machine" in their names?

RDF

what is query of this sentence in SPARQL?

2 Feb 2015 by Richard MacCutchan

See http://www.w3.org/TR/rdf-sparql-query/[^].

RDF

i am not getting the desired output while running this code

26 Mar 2015 by rukhs

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using VDS.RDF;using VDS.RDF.Writing;namespace dotnetrdf2{ public partial class Form1 :...

RDF

i am not getting the desired output while running this code

26 Mar 2015 by OriginalGriff

Well...this might be a problem...Console.ReadLine();Which is going to make your WinForms app stop at the end of the Load event and wait for you to type some data in the console you haven't got...Take it out!

RDF

Problem in reading RDF url in C#

20 May 2015 by Leo Chapiro

From Uniform Resource Locators (URL)[^]:Quote:Other characters are unsafe because gateways and other transport agents are known to sometimes modify such characters. These characters are "{", "}", "|", "\", "^", "~", "[", "]", and "`". All unsafe characters must always be...

C#5.0

RDF

Representing Information Models as RDF and OWL Vocabularies

16 Aug 2017 by Gerd Wagner

How to represent information models as RDF and OWL vocabularies, and how to embed simple meta-data statements (annotations) in web documents.

UML

OWL

RDF

What is the difference between OBQA ontology-based query answering and OBDA ontology-based data access?

13 Sep 2017 by Rawan Abo Zidan

i have a relational database and i want to access it using sparql,i want to build a system not to use the existing ones. so i read about Ontology based Data Access then i read about Ontology Based Query Answering,but i didn't know the difference between them,and i want to know the difference...

SQL

OWL

RDF

Is there any way to fetch the data from influxdb(cloud) or dynamodb(cloud) into the graphdb free tool and make a sparql query

25 Dec 2019 by Member 12128269

We have some data in both influxDb and dynamoDb. Now we want to fetch the data from both the DataStores into GraphDB free and make a sparql query by joining the results. What I have tried: We tried to fetch it using the URL directly in the import section of GraphDB Free but we are unable to do...

graph

RDF

Search keyword from dbpedia using nodejs

29 Jan 2020 by Member 8840306

I am new in node.js.I downloaded and executed a project from GitHub from this link.Here on this link there is live demo of this app. It is running rdf search using wikidata. This is the function that I found for the search of keyword from wikidata written in file...

Javascript

Node.js

RDF

How to create my own RDF model in java ?

26 Jun 2020 by Member 14874167

I have RDF model that has : --the following Classes : -Person. -Woman(subclass of person). -Man(subclass of person). -Child(subclass of person). -Son(subclass of child). -Daughter(subclass of child). --the object properties are :...

Java

model

RDF

How to create my own RDF model in java ?

26 Jun 2020 by Richard MacCutchan

Well of course you didn't find the source code. This is an exercise for you to show how much of your teacher's words you have understood. So go back to your lecture notes and start from the beginning. Looking at your question above the first...

Java

model

RDF

Semantic Database: Concept, Architecture and Implementation

25 Oct 2014 by Marc Clifton

No word has a value that can be identified independently of what else is in its vicinity.

Introduction to Semantika DRM

25 Jun 2014 by Josef Hardi

An introduction to the concept of Ontology-based Data Access and Semantika.

Java

RDF

API

SimpleRDFElement class makes it easier to handle RDF XML

6 Jul 2011 by GregStevens

The SimpleXML object bundled with PHP does not handle namespaces or RDF documents well. This extension class helps.

Developing Semantika Client Application

25 Jun 2014 by Josef Hardi

This is the third and final article about Semantika. This article will guide you to develop a simple "hello-world" query application

How to Convert URL to URI in RDF format ?

26 Oct 2011 by shanNSK

How to Convert Google maps URL to Open linked data format in rdf using C# and ASP.Net?for examplehttp://maps.google.com/Sacramento[^]instead...

ASP.NET

RDF

how to extract triples from html page in php ?

23 May 2015 by Walaa Al-Showa

I have a html page and I want to extract rdf triples from page..and then build rdf file from this triples .. then linked it with dbpedia.. what is the best way to do that? thanks.

OWL

PHP

RDF

Jena RDF: Duplicate Resources

16 Jun 2015 by Member 11769731

Hi,Is there any way to write duplicate resources(as below) to RDF file. Malcolm E. Wheeler 12 18 person Malcolm E. Wheeler 206 18 person I have to carry the...

Java

RDF