Has property description"Has property description <span style="font-size:small;">(Property description)</span>" is a predefined property that allows to describe a property in context of a language and is provided by Semantic MediaWiki.
A person known by this person (indicating some level of reciprocated interaction between the parties). (en) +
Heeft type"Heeft type <span style="font-size:small;">(Has type)</span>" is a predefined property that describes the datatype of a property and is provided by Semantic MediaWiki.