Get value of a special field — get_field

This function fetches the value of fields in a nested json, no matter on which level. Based on the very popular js, JSON command line processor https://stedolan.github.io/jq/

get_field_values(input, input_type = "url", jq_syntax)

Arguments

input: the json url
input_type: url when string, response when fetched response (e.g. when using the same response for multiple queries)
jq_syntax: jq filter (test here https://jqplay.org/)

Examples

if (FALSE) {
"https://lobid.org/resources/search?q=isbn:3596237785&format=json" %>%
get_field_values("gndIdentifier")
}