An abbreviation or code that names a country. This is information that can be used to identify a country that granted a patent or to provide a machine-comparable form of the name of a country as an addition to the content of the <country> element.
Although this attribute is optional and open to any value, for best practice, the country code should be provided whenever it is known, and the ISO 3166-1 2-letter alphabetic codes should be used, for example:
The complete list is available from ISO, in HTML, text-file, and XML-file versions at the following location: https://www.iso.org/obp/ui/#search (choose the country code button and search using the search icon).
On the element <country>, archives and publishers can use this attribute to regularize the input for searching without altering the element content, for example, placing a country code in the attribute when the <country> element content is fully spelled out or uses a non-standard country abbreviation.
OPTIONAL on many elements; click for list and usage
|Text, numbers, or special characters||An abbreviation for a country, typically using the ISO 3166-1 two-letter alphabetic codes, for example, “US” for the United States of America.|
|Restriction||@country is an optional attribute; there is no default.|
Country of a funding organization
... <award-group id="arda-511" award-type="contract"> <funding-source country="US">ARDA ACQUAINT</funding-source> <principal-award-recipient>Berkeley</principal-award-recipient> </award-group> ...
The @country attribute should use a strict vocabulary (such as the ISO 3166-1 Alpha-2 codes, see example below), but the element content may be uncontrolled.
... <address> ... <country country="GB">United Kingdom</country> </address> ...
Patent Number, Cited
... <element-citation publication-type="patent"> ... <collab collab-type="assignee">Hospira, Inc.</collab> <source>Microneedles for minimally invasive drug delivery</source> <patent country="US">United States patent US 6,980,855</patent> <year iso-8601-date="2005-12-27">2005</year> <month>Dec</month> <day>27</day> </element-citation> ...