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Issue #4: Device ID URN Proposal to use UUID URN with timestamp of zero Hokey What about GRUU instance ID No – two UA on same device will have different instance ID, same device ID Instance ID may be a good service instance identifier (id attribute) MAC is problematic Changes if interface card changes Proposal Describe relationship of GRUU instance ID and ID’s in the data model per above, including data model instance ID Change instance ID term due to overlap with GRUU term MAC is still fine, device ID can change -> correlation key property and is highly coupled with mac Multiple device IDs per service? Guidance for setting this? -> separate new ID |