SPARQL query involving wikiPageWikiLink not working

• OntologyProperty:WikiPageWikiLink

Just found the property is included in the dataset that downloaded from http://www.rdfhdt.org/datasets/, which is not found via SPARQL endpoint of DBpedia before.

This property denotes a "Link from a Wikipage to another Wikipage" and DBpedia extracts the Wikipedia page links and offers them for download, but does not add them to the public SPARQL endpoint. There are simply too many of them - they would overwhelm the SPARQL server.

This property might be useful to extract latent relationships between two resources:)

IRI, URI, URL and URN

IRI : (Internationalized Resource Identifier), compare to URI, it's characters are Unicode which means including Chinese, Japanese and Koreans etc.

URI : (Uniform Resource Identifier ), includes URL and URN.

URL : (Uniform Resource Locator), usually using specific protocols to locate resource within World Wide Web is the most common type of URI.

URN : (Uniform Resource Name), is also one of the URI type with urn:scheme and the typical use example is ISBN system.