| -1 (0xFFFFFFFF) || Returns a [[ACT_Services#Regular_UUIDs|regular UUID]].
+
| -1 (0xFFFFFFFF) || Generates a [[ACT_Services#Regular_UUIDs|regular UUID]].
|-
|-
−
| -2 (0xFFFFFFFE) || Returns a [[ACT_Services#Title-specific_UUIDs|title-specific UUID]] using the unique ID for the current (caller) process.
+
| -2 (0xFFFFFFFE) || Returns a [[ACT_Services#Title-specific_UUIDs|title-specific UUID]] using the unique ID for the current (caller) process, based on a freshly generated [[ACT_Services#Regular_UUIDs|regular UUID]].
|-
|-
−
| (all other values) || Returns a [[ACT_Services#Title-specific_UUIDs|title-specific UUID]] using the given unique ID value.
+
| (all other values) || Returns a [[ACT_Services#Title-specific_UUIDs|title-specific UUID]] using the given unique ID value, based on a freshly generated [[ACT_Services#Regular_UUIDs|regular UUID]].