Extracts the values from the metadata annotations for the given property or properties, and returns the result.
get_metadata_values(nexml, annotated = NULL, props)
a nexml object
the nexml component object from which to obtain metadata annotations, defaults to the nexml object itself
a character vector of property names for which to extract metadata annotations
a named character vector, giving the values and names being the property names
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
of the nexml
object. Names in the returned vector are mapped to the
(possibly prefixed) form in the input list.