DW1000 Discovery Phase question

hello every one
DW1000 Discovery Phase There are several question:
1.What is the Tag 64 bit ID in Blink Message? Is it the Destination Address in the subsequent Ranging Init Message?
2.How to obtain the Source Address in the Ranging Init Message?
3.Why is the Function code in the Variable in Poll, Response, or Final Message mentioned in the document inconsistent with that in STM32 dw ranging (see the following images)?

4.How can data communication sent by Tag avoid being received by two Anchors simultaneously? How to achieve timing management?