rdfs:comment that perfectly fit. Additionally, the domain of the notes is no longer limited to skos:Concept, so they can now be used with RDFS and OWL terms:
The following properties have been added to SKOS Core:- publicNote
- privateNote
- historyNote
- editorialNote
- changeNote
In addition, the following properties have been modified:
- definition
- example
- scopeNote
The modifications were:
(i) rdfs:domain statements removed.
(ii) Super-property statements changed.
...
rdfs:comment
- skos:publicNote
- - skos:definition
- - skos:example
- - skos:scopeNote
- - skos:historyNote
- skos:privateNote
- - skos:editorialNote
- - skos:changeNote
N.B. None of these properties have any rdfs domain/range statements, and so may be used to describe resources of any type.

