rdfs:comment http://tools.ietf.org/html/rfc5147#section-2.2.1, and http://tools.ietf.org/html/rfc5147#section, the subject string MUST be calculated relative to
rdfs:comment in http://tools.ietf.org/html/rfc5147#section-2.2.1, and http://tools.ietf.org/html/rfc5147#section, the subject string MUST be calculated relative to