Property	Value
A technical identifier, unique in a certain context. Technical key	`CIK_US`
The country a linked concept is active or generally relevant for. Country scope	US (United States of America)
Language-specific name. Monolingual name	Central Index Key (en)
Language-specific short name. Monolingual short name	US - Central Index Key (en)
Informal and comprehensive human-readable definition of a concept. Description	The Central Index Key (CIK) is used on the SEC's (US Security and Exchange Commission) computer systems to identify corporations and individual people who have filed disclosure with the SEC. An EIN is an Employer Identification Number issued by the United States IRS (Internal Revenue Service). IRS Numbers and EIN Numbers are completely seperate from CIK Numbers. CIK is a 10 digits number. When CIK has less then 10 digits, then leading zeros are missed.
Category of business identifiers. Identifier category	Identification Number

Formal definition

No format rules.

Data quality rules