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• Globally Unique: Each student should be uniquely identified across organizational and national boundaries
• Persistent: The identifier should follow the student while he/she is on student mobility
• Non-targeted: The identifier should be the same for all services involved in the student mobility processes
• Protocol neutral: The identifier should not change value depending on the protocol used. For example, it should be the same regardless of whether SAML or OpenID Connect is used
• Data transport neuralneutral: The identifier should not change value depending on how it is transported. For example, the students should be identified by the same identifier regardless if the it is through a federated authentication flow or a back-channel transfer of records.

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