- <country-code> is a valid ISO 3166 country code identifier to qualify the student code with so that it uniquely identifies the student within the Member State (officially assigned ISO 3166-1 alpha-2 country code) or administrative division (e.g. province or state; ISO 3166-2 code), where applicable.
- <sHO> is the Higher Education Institution's
schacHomeOrganizationvalue (possibly further qualified with the organisational unit issuing the student code). Required if the student code is issued by the Home Organization of the student (or one of its org units) and there can be no guarantee that it uniquely identifies the student within the Member State or administrative division.
- <code> is a string that uniquely identifies the student within the scope that it has been issued. It has to satisfy the requirements for strings to be used in URNs according to RFC 2141, sections 2.2 to 2.4.
- The complete schacPersonalUniqueCode attribute value for the ESI does not exceed 255 characters in length.