Introduction back to ToC

This is a place holder text for the introduction. The introduction should briefly describe the ontology, its motivation, state of the art and goals.

Namespace declarations

Table 1: Namespaces used in the document
[Ontology NS Prefix]<https://w3id.org/okn/o/sosen#>
sd<https://w3id.org/okn/o/sd>
owl<http://www.w3.org/2002/07/owl>
rdf<http://www.w3.org/1999/02/22-rdf-syntax-ns>
xsd<http://www.w3.org/2001/XMLSchema>
rdfs<http://www.w3.org/2000/01/rdf-schema>
default namespace<https://w3id.org/okn/o/sosen>