rdf.langStringLanguagerdf.langstringlanguagerdflangstringlanguage/apidoc/8.0/rdf:langString-language.xml
Returns the language of an rdf:langString value.
This function is a built-in.
The rdf:langString value.
valrdf.langStringString
rdf.langStringLanguage(rdf.langString("http://foo/bar", "en"));
=> en