The annotation ontology provides vocabulary that enables users to attach custom descriptions, identifiers, tags and ratings to resources on their desktop. Via other properties, the user is also able to make generic relationships between related resources explicit. Some relationships between resources are too general to be included at the domain ontology level. Instead, these properties are also defined in the annotation ontology. Given the high-level status of this ontology, these propreties can be used to link any related resources on the user's desktop, as well as provide custom human-readable textual annotations. (from homepage)
nepomuk.naoWhen using this resource in RDF, the following URI format should be used:
http://www.semanticdesktop.org/ontologies/2007/08/15/nao#$1
A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).
The local unique identifier created is used to demonstrate the providers
available for NEPOMUK Annotation Ontology Specification. Some providers may use a different example, which is displayed in the table below.
A guide for curating additional providers can be found
here.