@StevenMcGloin,
Based on the information provided, it seems like you are referring to some documentation or examples related to a system or application that involves the concept of "open" and "UUID."
In the context you mentioned, the presence or absence of a UUID for an "open" event is not explained in the documentation you reviewed. Without further information about the specific system or application you are referring to, it is difficult to determine the exact reason behind this inconsistency.
Note that the UUID might be optional for specific events or objects depending on the level of data integrity required. If the system can uniquely identify and process the "open" events without relying on a UUID, it might not be necessary to include it in those cases.
Also, the absence of a UUID in some cases might result from historical data or older system versions. Newer versions or updated data might include UUIDs consistently for all relevant events or objects.