What does RR and xx mean?

Dear all,

I have an simple question about Finance.
What does RR and xx mean in USD10YT = RR and USD10YT =xx?

Does RR stands for “Repo Rate”?

Did you find that in a specific Julia package? I don’t think this question is even possible to answer without more context. And a Julia forum might well be less likely than the general populace to be able to answer.