UML22 — Section: Activities - ForkNode semantics wording

ForkNode semantics wording. In semantics of ForkNode, the phrase "keep their copy in an implicit FIFO queue until it can be accepted by the target" should not be different from other situations of ordered offers to refusing targets. In particular, it should be refined to clarify that the acceptance of offers by a fork is the same as acceptance by object nodes in the sense that they can't be revoked once accepted, and that for the edges leading to refusing targets, the offers are standing along those edges in the order they were received.

In general, the ForkNode semantics needs to be more carefully worded in terms of offers of tokens, rather than just the tokens themselves "arriving" at a fork node.