Tenor
The column titled #Tenor in the table associated with the key Setis mandatory and contains elements of type Step.
Each element represents the length of the corresponding swap, expressed as time interval.
More precisely, the effective (start) date of the corresponding swap, which is the date when the swap's legs start accruing, is Tₛ = T₀ + s where T₀ is the trade date and s is the settlement period defined by the entry Swap Settle
The nominal maturity date of the swap is then calculated as T = Tₛ + τ, where τ is the time interval specified here.
Note, T may fall on a non-business day.
T is then used to construct the dates that define the accrual periods of each leg by taking into account the leg's calendar and date bump convention specified in Src Cp Prd or Tgt Cp Prd as applicable, as well as the entries in EOM or Rule
It follows that the resulting accrual period dates may differ between the two legs and the latest of these dates may not match T.