rdf_serialize {rdflib} | R Documentation |
Serialize an RDF Document
Description
Serialize an RDF Document
Usage
rdf_serialize(
rdf,
doc = NULL,
format = c("guess", "rdfxml", "nquads", "ntriples", "turtle", "jsonld"),
namespace = NULL,
prefix = names(namespace),
base = getOption("rdf_base_uri", "localhost://"),
...
)
Arguments
rdf |
an existing rdf triplestore to extend with triples from the parsed file. Default will create a new rdf object. |
doc |
file path to write out to. If null, will write to character. |
format |
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. |
namespace |
a named character containing the prefix to namespace bindings. |
prefix |
(optional) for backward compatibility. See |
base |
the base URI to assume for any relative URIs (blank nodes) |
... |
additional arguments to |
Value
rdf_serialize returns the output file path doc
invisibly.
This makes it easier to use rdf_serialize in pipe chains with
rdf_parse
.
Examples
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)