There seems to be a mismatch between the vocabulary and its documentation, I suspect an older or incomplete version of the vocabulary is currently online.
The doc and pdf documentation available on this page mention attributes that are not present in the TTL and RDF version, namely the definition of cpsv:hasChannel and the rdfs:definedBy specification of each term. The PURL of the vocabulary (http://purl.org/vocab/cpsv) refers to the RDF version.
Furthermore, the html documentation on that same page refers to a page containing the final draft document ("Final Draft - Version 1.00"), rather than the actual documentation. This page contains a link to the "most recent version", which links to the core person vocabulary, a totally different vocabulary!