Solution : https://service.sap.com/sap/support/notes/936151 (SAP Service marketplace login required)
Key words :
abap data type, scal ddic structure, sap_bw software component, quantity object supports, terms quantity object, severable restricted dimensions, special implementation created, date conversion reason, abstract cl_rsmds_dimension class, source dimension obtains
Related Notes :
938249 | Quantity object for InfoObjects: Simple date conversions |