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Get / set a concept definition for a vector or a dataset

Source: R/var_concept.R
var_concept.Rd

Assigns a concept URI to a vector created with defined(). This method updates the concept attribute and validates that the input is a single character string or NULL.

Usage

var_concept(x, ...)

var_concept(x) <- value

# Default S3 method
var_concept(x) <- value

Arguments

x

A vector to which the concept URI will be assigned.

...

Further parameters for inheritance, not in use.

value

A character string with a concept URI or NULL to remove the concept.

Value

The (linked) concept of the meaning of the data contained by a vector constructed withdefined().

The modified vector with updated concept metadata.

Details

get_variable_concepts() is identical to var_concept().

Examples

small_country_dataset <- dataset_df(
  country_name = defined(c("Andorra", "Lichtenstein"), label = "Country"),
  gdp = defined(c(3897, 7365),
    label = "Gross Domestic Product",
    unit = "million dollars"
  )
)
var_concept(small_country_dataset$country_name) <- "http://data.europa.eu/bna/c_6c2bb82d"
var_concept(small_country_dataset$country_name)
#> [1] "http://data.europa.eu/bna/c_6c2bb82d"
# To remove a concept definition of variable
var_concept(small_country_dataset$country_name) <- NULL
x <- defined(c(1, 2, 3), label = "Example Variable")
var_concept(x) <- "http://example.org/concept/XYZ"
var_concept(x)
#> [1] "http://example.org/concept/XYZ"