(This page is still under construction.)


Some help (such as sample SPARQL queries) can be found on answers.semanticweb.com and/or Stack Overflow. The most recent 10 posts for each site should be seen in the Feeds section, lower down on this page. Full searches are linked here --


If the information you need cannot be found there, you can:

  1. create a new post on one of the Overflow sites and use the tag “dbpedia”
  2. check the DBpedia support page .

Feeds

(Still not displayed correctly, we are working on aggregating the feed)

answers.semanticweb.com

Which are the DBpedia entities of type Agent that are not of type Thing?

Hi,

I'm trying to extract the DBpedia entities that has "rdf:type Agent" and has not "rdf:type owl:Thing". I wrote this query:

PREFIX dbpedia-owl: http://dbpedia.org/ontology/ SELECT ?entity { ?entity rdf:type dbpedia-owl:Agent . FILTER NOT EXISTS { ?entity rdf:type owl:Thing } }

Something strange happens in the results. The first 8 results, have "rdf:type Agent" and have not "rdf:type owl:Thing". The 9th result, Management, has no rdf:type but in the top of the page there's "An Entity of Type : Thing".

This is quite strange because in the query is specified that ?entity must be of type Agent. Moreover, the query specified to filter the entity with type owl:Thing with the FILTER operator.

How this is possible?

Thanks in advance Fabio

How to find a relationship between two resources on DBpedia?

Hello all,

if a have two resources, for example: http://dbpedia.org/resource/France and http://dbpedia.org/resource/Mitsubishi

[the Two resources : France and Mitsubishi]

How can I get the relations between these two resources using SPARQL queries?? and I mean by relation (is a - has a ) or some thing like that?

DBPedia Local Store and comparing it with other semantic database

Hello, I want to setup a local store which will have all the dbpedia data and similar semantic rdf data. I want to compare the classes and bring a union of the properties matching in all the semantic rdf files. For example if i query about a place in dbpedia and again in openlink then I want to compare the results and give more ratings to only the properties which match. Also i want the dbpedia updates to be synchronized. I also need to know what type of database table structure i will need if i have to integrate this data in my database. I need to know what hardware and software i need to do this. I also need to know whether any paid/free service is available for doing this activity. Sorry if i am not clear by i can give some more explainations.

Where to look for mapping of prefix

In Live Dbpedia there is a property prop, what is the mapping for this?

PREFIX prop: ??????

In general how do I look up mapping for a PREFIX?

The page I look at is at Live Dbpedia link text . The property I want to use is prop:years.
The same info is at Dbpedia link text. The propety dbpprop:years is a list instead of a single value as in prop:years. So I think prop is not dbpprop

Note: if you land on the old live.dbpedia on the first link, click Try New Dbpedia. I copy the link from the New Dbpedia and did not realize that the link would land on the Old one.

How to sort on the second item of a property

I try to sort on a property, but this property is a list and the sorting is on the first item. How do I sort on the second item. This is my query

PREFIX dbpprop: <http://dbpedia.org/property/>

SELECT DISTINCT ?s ?y
WHERE {  
    ?s dbpprop:title dbpedia:List_of_tallest_buildings_in_Vietnam .
    ?s dbpprop:years ?y .
}
ORDER BY DESC(?y)

And the property y has values year and height. The sorting is on the year and I would like to sort on height.

steps to link my data

hi, if i want to link my data to bdpedia should i map my data to the lod vocabulary first ??? or i can link my data to dbpedia just by making links like this : <owl:ontology rdf:about="">

<owl:imports rdf:resource="http://dbpedia.org/resource/Almond"/>

<owl:thing rdf:id="almond">

<owl:sameas rdf:resource="http://dbpedia.org/resource/Almond"/>

<Ontology1399520089494:origin rdf:datatype="http://www.w3.org/2001/XMLSchema#string"

vegetarian</ontology1399520089494:origin>

<Ontology1399520089494:type rdf:datatype="http://www.w3.org/2001/XMLSchema#string"

dried fruit</ontology1399520089494:type>

<rdf:type rdf:resource="#naturel"/> </owl:thing

if i make thiselinks and then i publish my data in datahub sites does it mean that i can access to dbpedia ?? please help because i'm lost thanks in advance

linked data with TopBraid composer

hi , if i use TopBraid Composer to link my ontology to DBpedia(using same as and owl:import property) and then publish my ontology using puppy does it mean that i can access to dbpedia ?? and get all the comment about almond inn dbpedia ?? for exemple if i have :

<owl:ontology rdf:about="">

<owl:imports rdf:resource="http://dbpedia.org/resource/Almond"/>

<owl:Thing rdf:ID="almond">

<owl:sameAs rdf:resource="http://dbpedia.org/resource/Almond"/>

<Ontology1399520089494:origin rdf:datatype="http://www.w3.org/2001/XMLSchema#string"

>vegetarian</Ontology1399520089494:origin>

<Ontology1399520089494:type rdf:datatype="http://www.w3.org/2001/XMLSchema#string"
>dried fruit</Ontology1399520089494:type>

<rdf:type rdf:resource="#naturel"/>

</owl:thing>

how can i publish my data using the mechanism of OWL import

hi , after reading i understand this : - if i want to publish my vocabulary as linked data i have to explicitly use a lod vocabulary(foaf or dc) in my vocabulary _ or i can use the mechanism of OWL import i'm right ??

how can i use the mechanism of owl import to link my data ?? what is the difference between these two approaches

please help me because i'm confused thanks in advance

upload food ontology of dbpedia

hi, i want to upload the food ontology of DBpedia (http://dbpedia.org/ontology/Food) where can i found it ps: just the food ontology of DBpedia not all dbpedia help me please thanks in advance ^^

link to dbpedia

hi, if i want to link my ontology to dbpedia is the property owl:same as sufficient ??

for example if i have

<industriel rdf:about="#Almond"> <rdf:type rdf:resource="&amp;owl;Thing"/> <owl:sameas rdf:resource="http://dbpedia.org/page/Almond"/> </industriel> does it mean that i can access to Dbpedia ? does it mean that i can have the coment of Almond from dbpedia using a sparql query ??? thanks in advance



 
There are no files on this page. [Display files/form]
There is no comment on this page. [Display comments/form]

Information

Last Modification: 2011-07-24 20:04:59 by Sebastian Hellmann