DBpedia domains and URIs

Long-term goals

• All languages use IRIs, not URIs

Items	IRI pattern
Ontology classes and properties	http://dbpedia.org/ontology/Xyz
Datatypes	http://dbpedia.org/datatype/xyz
Resource IRI for http://xx.wikipedia.org/wiki/Xyz	http://xx.dbpedia.org/resource/Xyz
Properties extracted by generic template extractor from http://xx.wikipedia.org/ pages	http://xx.dbpedia.org/property/xyz

Deviations from these rules

In the past, we did not follow these rules. For backwards compatibility, we will allow some deviations for a while. Might be a long while. :-)

• Some international chapters use URIs, not IRIs. See the list of DBpedia chapters for details. The main DBpedia release will offer additional datasets with IRIs for download, but the main datasets will use URIs.

Items	deviating IRI pattern
Resource URI for http://en.wikipedia.org/wiki/Xyz	http://dbpedia.org/resource/Xyz
Properties extracted by generic template extractor from http://en.wikipedia.org/ pages	http://dbpedia.org/property/xyz

Notes

The main DBpedia release and a DBpedia chapter must use the same syntax for equivalent IRIs.

We used to map page titles from non-English Wikipedias to IRIs using the inter-language link to the English Wikipedia. If there was no such inter-language link, we did not extract any data from the non-English page. That was because we used URIs like http://dbpedia.org/resource/Xyz for all languages and had to 'normalize' the URIs. We will not do that anymore - we will use http://xx.dbpedia.org/resource/Xyz IRIs.

Implementation details

During the extraction, the framework will use http://xx.dbpedia.org/ IRIs for all languages, even English. Different serializers will serialize them differently, according to some rules, for example:

• convert en.dbpedia.org to dbpedia.org
• convert IRIs to URIs for some languages (in subjects, predicates and objects)