vCard ontology

Page numbers are for draft copy at present; they will be replaced with correct numbers when final book is formatted. Chapter numbers are correct and will not change now.

The vCard ontology is a standard way of describing contact details for people ... that is the information one might find in a 'visiting card'. It arose as an emergent standard for interchange between contact management systems and as a web microformat. The RDF form is used extensively in semantic web ontologies.

Used on Chap. 17: page 396