Is it an ISSN?

Is it an ISSN?

Usage

is_issn(x)

Arguments

x

A character vector.

Value

Logical vector; TRUE for dddd-dddC with a valid mod-11 check digit (C may be X).

See also

Other research-id detectors: is_doi(), is_isbn(), is_npi(), is_orcid()

Examples

is_issn(c("0003-021X", "0161-9268", "0003-0210", NA))
#> [1]  TRUE  TRUE FALSE    NA