Missing an enumerated value for installment payment (acceptedPaymentMethod)

I'm working on some markup for a site that offers multiple payment methods
and noticed schema.org & goodrelations doen't have an enumeration for
'installment payment'.

Is there a good reason for it not to exist or should it be added (to either
schema.org or goodrelations)?

Received on Tuesday, 6 September 2016 10:55:19 UTC