In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen.
(source: https://en.wikipedia.org)
Using a Fregian terminology, a type is a reference to a token, thus a class member, with the sense of the class (Oliver)
A site.type is a reference to a cidoc=crm:{site} (a token or class member), where the sense of the class is defined in an academic field, such as geography or ethnography:{ethnogoraphy}, or in a specific cultures described. Multiclass classification is possible and desired, e.g. for the purpose of comparative studies how sites are conceptualized. (Oliver)