The Semantic Web - Social Semantics: The Search for Meaning on the Web - page 72

- rdfs:subClassOf Resource
- ir:isRealizedBy min 1 ir:InformationRealization
- owl:equivalentTo ont:InformationResource
- owl:equivalentTo ir:InformationObject , which is defined by
ir: as “A piece of information, such as a musical composition, a text, a word,
a picture, independently from how it is concretely realized” (Gangemi 2008).

￿ ir:InformationRealization : An OWL Class. Imported from ir: .“A
concrete realization of an expression, e.g. the written document containing the
text of a law” (Gangemi 2008). This is equivalent to the broader notion of
representation as defined in AWWW, “data that encodes information about
resource state” (Jacobs and Walsh 2004).
￿ ir:realizes : An OWL Object Property. Imported from ir: . “A relation
between an information realization and an information object, e.g. the paper copy
of the Italian Constitution realizes the text of the Constitution” (Gangemi 2008).

- owl:inverseOf ir:isRealizedBy
- rdfs:domain ir:InformationRealization
- rdfs:range ir:InformationObject
￿ about : An OWL Object Property. An intentional relationship between an infor-
mation resource and another resource. Note that this property is wider than the in-
verse functional foaf:primaryTopic and foaf:isPrimaryTopicOf
properties of the Friend of a Friend (FOAF) vocabulary, 10 which
could be considered sub-properties of this property, as the about property
makes no claims about whether a topic is primary or not.

- owl:inverseOf : isTopicOf
- rdfs:domain InformationResource
- rdfs:range Resource

3.4.3 Web Resources and Web Representations

Up until this section, the work done by IRW has, outside of mentioning URIs,
not been specific to the Web per se, but explicating the more general ideas of
information and resources that apply equally as well to topics as to web-pages. In
this section, we further specialize IRW to the Web domain by considering the notion
of 'representations' that can be transferred over a protocol such as HTTP. To avoid
confusion with the broader philosophical notion of representation, we call this term
from Web architecture web representations instead. Also, it is possible our use
of the term 'representation' is narrower than the AWWW's use, which could be

10 The foaf: prefix stands for http://xmlns.com/foaf/0.1/ .