# File Names

File names consist of up to four parts, separated by underscores:

- Basic entity type. For example, place, number, or person.
- Further detail on the basic type. For example, malefirstname or ss for Social Security number. This part is optional.
- Language. The three-character ISO 639-2/B code in which the grammar was written. For example, eng for English.
- Country. The two-character ISO 3166-1 code describing the country for which the grammar was written. For example: us for the United States. This part is optional if the grammar does not target a specific country (for example, a credit card number).

NOTE: Entity names follow the same four-part structure, except for the basic type. The further detail and language/country parts are separated by forward slashes. The language code and the optional country code are concatenated.

_FT_HTML5_bannerTitle.htm