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

Posted by lennyks on Stack Overflow See other posts from Stack Overflow or by lennyks
Published on 2010-05-03T20:12:49Z Indexed on 2010/05/03 22:08 UTC
Read the original article Hit count: 335

Filed under:

java

|

semantic-web

|

rdf

|

rdfs

|

triplestore

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 very resource and then retrieve all the triples given some URI.

I have tried naïve approaches by writing statements in a WHERE clause such as:

?x rdf:about ?y and ?x rdfs:about ?y

I hope I am being precise.

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about semantic-web

Top 10 Reasons Not To Do a Semantic Web Project

as seen on Devx - Search for 'Devx'
A startup's goal is success via the most simple and fastest route, and the Semantic Web rarely offers that in practice. >>> More
Recommend a Semantic Web book?

as seen on Stack Overflow - Search for 'Stack Overflow'
I've looked around but most books seem to fall into one of two categories: Either the book talks about SW technologies but doesn't teach you how to use them Or the book is geared for very complex data modeling and ontology creation. Worse, many of those books are outdated. I'm looking for an… >>> More
The Art of Narrative and the Semantic Web

as seen on Internet.com - Search for 'Internet.com'
As the Internet continues to evolve, Semantic Web technologies are beginning to emerge, but widespread adoption is likely to still be two to three years out. >>> More
Use Cases Dictate How You Adopt the Semantic Web

as seen on Internet.com - Search for 'Internet.com'
Designing Semantic Web applications involves a much more sophisticated and forward-thinking set of use cases than traditional web applications do. Find out why. >>> More
RDF and OWL: Have these delivered the promises of the Semantic Web?

as seen on Programmers - Search for 'Programmers'
These days I've been learning a lot about how different scientific fields are trying to move their data over to the Semantic Web in order to "free up data from being stored in isolated silos". I read a lot about how these fields are saying how their efforts are implementing the "visions" of the Semantic… >>> More