SWI-Prolog -- rdf

Availability::- use_module(library(semweb/rdf_db)).

Write RDF data as RDF/XML. Options is a list of one or more of the following options:

graph(+Graph): Save only triples associated to the given named Graph.
anon(Bool): If false (default true) do not save blank nodes that do not appear (indirectly) as object of a named resource.
base_uri(URI): BaseURI used. If present, all URIs that can be represented relative to this base are written using their shorthand. See also write_xml_base option
convert_typed_literal(:Convertor): Call Convertor(-Type, -Content, +RDFObject), providing the opposite for the convert_typed_literal option of the RDF parser.
document_language(+Lang): Initial xml:lang saved with rdf:RDF element
encoding(Encoding): Encoding for the output. Either utf8 or iso_latin_1
inline(+Bool): If true (default false), inline resources when encountered for the first time. Normally, only bnodes are handled this way.
namespaces(+List): Explicitely specify saved namespace declarations. See rdf_save_header/2 option namespaces for details.
sorted(+Boolean): If true (default false), emit subjects sorted on the full URI. Useful to make file comparison easier.
write_xml_base(Bool): If false, do not include the xml:base declaration that is written normally when using the base_uri option.
xml_attributes(+Bool): If false (default true), never use xml attributes to save plain literal attributes, i.e., always used an XML element as in <name>Joe</name>.

Out Location to save the data. This can also be a file-url (file://path) or a stream wrapped in a term stream(Out).