Hi Inga, Yes: as an instance of shared type Offset, paymentDaysOffset contains dayType (strictly an element, not an attribute) at FpML 4-6. In general, the core features of the Interest Rate product models have been stable since FpML 2-0. Version-on-version changes are documented with the Specification – look in the online documentation, section 1 Introduction & Overview, sub-section 1.6(?) Changes in this version. Tracking the introduction of elements across major versions is harder, and may depend on comparing the content of schema modules (not always straightforward, as schema content may have been merged/split/re-located over time). With apologies for the delayed response. Harry McAllister Chair, IRD-WG
