An ontology that describes tags, as used in the popular del.icio.us and Flickr systems, and allows for relationships between tags to be described.
Tag ontology
An ontology for tags.
Indicates that the subject has been tagged with the object tag. This does not assert by who, when, or why the tagging occurred. For that information, use a reified Tagging resource.
tagged with tag
A reified class which defines an instance of a tagging by an agent of a resource with one or more tags.
tagging
The subject Tagging occurred at the subject time and date.
tagged on
The object plays the role of the tagger in the subject Tagging.
tagged by
A Tagging which has precisely one associated resource, and one associated tag.
restricted tagging
The two tags are asserted to be equivalent --- that is, that whenever one is associated with a resource, the other tag can be logically inferred to also be associated. Be very careful with this. I'm not sure if this should be a subproperty of owl:sameAs.
equivalent tag
Tag
A natural-language concept which is used to annotate another resource.
The relationship between a resource and a Tagging. Note, of course, that this allows us to tag tags and taggings themselves...
tag
Indicates that the subject tag applies to the object resource. This does not assert by who, when, or why the tagging occurred. For that information, use a reified Tagging resource.
is tag of
The name of a tag. Note that we can't relate this to skos:prefLabel because we cannot guarantee that tags have unique labels in a given conceptual scheme. Or can we?
tag name
The two tags are asserted as being related. This might be symmetric, but it certainly isn't transitive.
related tag
The object is a Tag which plays a role in the subject Tagging.
The object is a resource which plays a role in the subject Tagging.
tagged resource
The name of a tag. Note that we can't relate this to skos:prefLabel because we cannot guarantee that tags have unique labels in a given conceptual scheme. Or can we? DEPRECATED 2005-05-19: redundant 'tag'.