Skip to contents

Write a dataset into Turtle serialisation

Source: R/ttl_write.R
ttl_write.Rd

Write a dataset into a Turtle serialisation.

Usage

ttl_write(tdf, ttl_namespace = NULL, file_path, overwrite = TRUE)

Arguments

tdf

A dataset in exactly three columns.

ttl_namespace

The namespace definitions of the dataset.

file_path

The path to the file that should be written or appended.

overwrite

If the file exists, overwrite it? Defaults to TRUE.

Value

A text file with the prefix and the observation serialisations.

Examples

tdf <- data.frame (s = c("eg:01","eg:02",  "eg:01", "eg:02", "eg:01" ),
                   p = c("a", "a", "eg-var:", "eg-var:", "rdfs:label"),
                   o = c("qb:Observation",
                         "qb:Observation",
                         "\"1\"^^<xs:decimal>",
                         "\"2\"^^<xs:decimal>", 
                         '"Example observation"'))

examplefile <- file.path(tempdir(), "ttl_dataset_write.ttl")

dataset_ttl_write(tdf=tdf, file_path = examplefile)
#> Error in ttl_observations_write(tdf, file_path): could not find function "ttl_observations_write"

readLines(examplefile)
#> [1] "@prefix  owl:        <http://www.w3.org/2002/07/owl#> ."             
#> [2] "@prefix  qb:         <http://purl.org/linked-data/cube#> ."          
#> [3] "@prefix  rdf:        <http://www.w3.org/1999/02/22-rdf-syntax-ns#> ."
#> [4] "@prefix  rdfs:       <http://www.w3.org/2000/01/rdf-schema#> ."      
#> [5] "@prefix  xsd:        <http://www.w3.org/2001/XMLSchema#> ."