Questions tagged [semantic-web]

Representation of database record subjects (a/k/a keys, IDs, entities), predicates (a/k/a columns, attributes), and objects (a/k/a values) as triples, where the first two are always URIs, and the third is either a URI or a literal; enabling humans and machines to more easily share, merge, and evaluate data from heterogeneous origins.

The Semantic Web (Web 3.0) provides a common framework that allows data to be shared and reused across application, enterprise, and community boundaries. It is a collaborative effort led by the W3C with participation from a large number of researchers and industrial partners. It is based on the Resource Description Framework (RDF).

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ontology application project

I am looking for a project (application) that makes use of Ontology (for an academic course). Every body is talking about the health care application. I want to work on a different project. please any suggestion could help.
Ayoub M.
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How to build a PHP webpage using ontology that already mapped to relational database

It's my very first time building for the semantic web. I'm not sure how to create a PHP webpage and connect it to an ontology which I have mapped to a relational database using the Ontop plugin for Protege. Has the database become rdfstore? I have…
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SWRL comparing a dateTime over time

I need to define a SWRL rule that checks whether the time of a xsd:dateTime datatype is between two specific times. How can i do that? I would need something that is compatible with Protégé. Thanks a lot.
Cilla
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Generate Curies using Halcyon.net

Using the Halcyon .NET library (https://github.com/visualeyes/halcyon), I can generate the HAL (http://stateless.co/hal_specification.html) output that I need for my prototype API. However, I would like to add curies in to document additional…
goofballLogic
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SPARQL - how to do a join operation

I have a model, where I have 3 classes: SR - HCVR - CR - StudentRecord has a property…
manishKungwani
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OWL 2 - Assert that if not likes smth then dislikes it

I have the axiom: individual A does not like what individual B likes. Then, there are the properties, like and dislike. I want to be inferred that when someone does not like something then he dislikes it. I have added that like and dislike are…
LostIT
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Is this pure RDF or RDF Schema statement?

user697911
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How would I model 2 different vendors on an online marketplace selling the same product; i.e. with the same productID?

Take Ebay for example. Ebay has an unlimited about of vendors. However, what if two vendors were to sell the same product. That product would have the same productID right? How would I go about modelling this using RDF(s) or OWL?
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How to query a LUBM ontology?

How to query a LUBM ontology(extracted form given univ-bench.owl. given on the official site using generator) to find how many university it contains?
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Is there a method to get the URIs from a JENA ARQ Query?

import org.apache.jena.query.Query; public myClass{ public static void myMethod(Query querySparQL) { List A = querySparQL.getGraphURIs(); List B = querySparQL.getNamedGraphURIs(); List C =…
tremendows
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OWL Inferences With Jena (Turtle format)

I'm trying to make OWL inferences with Jena. As a start, my goal is merely to infer that if an educational institution is of type dbo:EducationalInstitution, then it is also dbo:institution Here's the java code (adapted from the jena doc) : package…
micoco
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Login failed for user 'XYZ' Error: 18456, Severity: 14, State: 5

I'm trying to map the content of a relational database to RDF using D2RQ. To generate-mapping I'm using Command Prompt. I’m trying to access the SQL Server database but I’m getting the error: Database Connection to…
Buni
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Is there a central SPARQL endpoint for the semantic web

We are going to have the semantic web. Now we have LOD cloud. Every data set has its own SPARQL endpoint. I can query the dataset triples. How can I query the whole semantic web or LOD?
Wisamx
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Mapping mysql database to owl

I would like to create an ontology for MySQL database using protege, after that, I would like to map the database with the ontology. Can anyone help me and send me any resources or example?
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Federated SPARQL Query on a subgraph of a SPARQL endpoint

I would like to ask, how to do a federated SPARQL query on a subgraph of a SPARQL endpoint (not the entire remote SPARQL endpoint). I got my data in Virtuoso v7 while the SPARQL endpoint is "http://localhost:8890/sparql", I'd like to do a remote…