<https://schema.org/additionalType>
<http://www.w3.org/2000/01/rdf-schema#comment>
"An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. In RDFa syntax, it is better to use the native RDFa syntax - the 'typeof' attribute - for multiple types. Schema.org tools may have only weaker understanding of extra types, in particular those defined externally."
<https://www.schema.org/LocationFeatureSpecification>