The following table has been used to initialize the free/busy time types registry.
+---------------------+---------+-------------------------+ | Free/Busy Time Type | Status | Reference | +---------------------+---------+-------------------------+ | FREE | Current | RFC 5545, Section 3.2.9 | | | | | | BUSY | Current | RFC 5545, Section 3.2.9 | | | | | | BUSY-UNAVAILABLE | Current | RFC 5545, Section 3.2.9 | | | | | | BUSY-TENTATIVE | Current | RFC 5545, Section 3.2.9 | +---------------------+---------+-------------------------+