write_nquads: write object out as nquads

In cboettig/rdftools: Common tools for RDF data

Description

write object out as nquads

Usage

write_nquads(x, file, prefix = NULL, compress = grepl("[.]gz$", file),
  ...)

Arguments

x	an object that can be represented as nquads
file	output filename
prefix	URI prefix that should be used to identify column names. Can be of the form "http://schema.org/", or "iris:".
compress	Compress nquads with gzip? (Very effective for large files. Note that Virtuoso and other parsers can read compressed files directly.)
...	additional parameters, see examples

Examples

iris_file <- tempfile(fileext = ".nq.gz")
library(datasets)
write_nquads(iris, iris_file)

# Use key_column to indicate that a column should be treated
# as the primary key.  This column is then prefixed (if not
# already a URI) and used as the subject for the corresponding
# rows.
car_file <- tempfile(fileext = ".nq")
mtcars$model <- rownames(mtcars)
mtcars$car_id <- 1:length(mtcars[[1]])
write_nquads(mtcars,
             car_file,
             prefix = "mtcars",
             key_column = "car_id")

cboettig/rdftools documentation built on May 6, 2019, 1:35 a.m.