Question: What is the significance of the first label in a ProSe Application ID Name, and how does it differ from subsequent labels in terms of wild carding?
Option 1: The first label can be any string and is not subject to wild carding, while subsequent labels must follow a specific format and can be wild carded.
Option 2: The first label must be "ProSeApp" and cannot be wild carded, whereas any subsequent label can be represented as a wild card ("")
Option 3: All labels, including the first one, can be wild carded for broader matching, with no specific requirement for the first label.
Option 4: The first label has no specific format requirement but cannot be wild carded, unlike subsequent labels which must follow a strict format and can be wild carded.
Explanation: In ProSe Application ID Names, the first label on the left is mandated to be "ProSeApp", distinguishing it from other possible labels. Unlike subsequent labels that can be represented with a wild card ("") for flexibility in matching, the first label ("ProSeApp") does not allow wild carding, ensuring a consistent identifier prefix across all ProSe Application ID Names.