2.2.1.1.2 Non-global Public Cloud
A non-global public Cloud is a Cloud which exists on an interface that also has a global IPv6 address. In this case, the name of the Cloud MUST be identified by a string that is structured as follows.
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scopename "_" ipv6globalprefix scopename = "LinkLocal" / "SiteLocal"
where ipv6globalprefix is the prefix of a global IPv6 address, as specified in [RFC3513] section 2.3.