Token Terminology

Token	Meaning
BT	Base Token – standardized wrapped version of the underlying yield-bearing asset (equivalent to SY in Pendle)
PT	Principal Token – discounted fixed-return token, redeemable 1:1 for BT at maturity
YT	Yield Token – receives 100% of the yield generated from now until maturity
vPT	Virtual PT – internal accounting token that makes single-asset liquidity possible