Serialize an RDF Document
rdf_serialize(
rdf,
doc = NULL,
format = c("guess", "rdfxml", "nquads", "ntriples", "turtle", "jsonld"),
namespace = NULL,
prefix = names(namespace),
base = getOption("rdf_base_uri", "localhost://"),
...
)
an existing rdf triplestore to extend with triples from the parsed file. Default will create a new rdf object.
file path to write out to. If null, will write to character.
rdf serialization format of the doc, one of "rdfxml", "nquads", "ntriples", "turtle" or "jsonld". If not provided, will try to guess based on file extension and fall back on rdfxml.
a named character containing the prefix to namespace bindings. names(namespace)
are the prefixes, whereas namespace
are the namespaces
(optional) for backward compatibility. See namespace
. It contains the matching prefixes to the namespaces in namespace
and is set automatically if you provide namespace
as a named character vector.
the base URI to assume for any relative URIs (blank nodes)
additional arguments to redland::serializeToFile
rdf_serialize returns the output file path doc
invisibly.
This makes it easier to use rdf_serialize in pipe chains with
rdf_parse
.
# NOT RUN { infile <- system.file("extdata", "dc.rdf", package="redland") out <- tempfile("file", fileext = ".rdf") some_rdf <- rdf_parse(infile) rdf_add(some_rdf, subject = "http://www.dajobe.org/dave-beckett", predicate = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type", object = "http://xmlns.com/foaf/0.1/Person") rdf_serialize(some_rdf, out) ## With a namespace rdf_serialize(some_rdf, out, format = "turtle", namespace = c(dc = "http://purl.org/dc/elements/1.1/", foaf = "http://xmlns.com/foaf/0.1/") ) readLines(out) # }