Add support to indicate that the rightOperand is a reference (URI) to a value, not the value itself. See: https://www.w3.org/2016/poe/wiki/Requirements#POE.R.E.01_Referring_to_external_resources_for_defining_payment_fees
Add support to indicate that the rightOperand is a reference (URI) to a value, not the value itself.
See: https://www.w3.org/2016/poe/wiki/Requirements#POE.R.E.01_Referring_to_external_resources_for_defining_payment_fees