Read an EIN written in any common form

Ingests an Employer Identification Number however it arrives — nine digits, hyphenated, or with the leading zero stripped by a spreadsheet — and returns the canonical hyphenated form `NN-NNNNNNN`. This is the form the type ontology declares as the stable value for `identifier / id / administrative (ein)`, so a datagoodr-stabilized EIN and a formex-stabilized EIN are the same string.

Usage

read_ein(x)

Arguments

x

A single EIN value (numeric or character).

Value

A canonical `"NN-NNNNNNN"` EIN string, `NA` if `x` is `NA`, or `NA` with a warning when `x` does not hold nine or fewer digits.

See also

[read_mm()], [read_yyyy()], [read_yyyymm()]

Examples

read_ein("12345678")    # leading zero restored
#> [1] "01-2345678"
read_ein("01-2345678")  # already canonical
#> [1] "01-2345678"