Extracts meta objects matching propertiesSource:
Extracts the metadata annotations for the given property or properties,
and returns the result as a list of
a nexml object
the nexml component object from which to obtain metadata annotations, or a list of such objects. Defaults to the nexml object itself.
a character vector of property names for which to extract metadata annotations
For matching property identifiers (i.e., URIs), prefixes in the input list
as well as in the
annotated object will be expanded using the namespaces
nexml object. Names in the returned list are mapped to the
(possibly prefixed) form in the input list. The resulting list is flat,
and hence does not retain the nesting hierarchy in the object's annotation.