modelling reduplication (Duplifix?)

Ablaut can obviously be handled as a Simulfix but how would reduplication
be modelled? e.g. Ancient Greek (and Indo-European in general) has a
highlight productive CeC- from C- reduplication process. Malayo-Polynesian
languages use reduplication for plural formation. [1] has many many other
examples.

Sounds like we need a Duplifix.

Are there other positional categories in [2] not covered?

Incidentally, does anyone know the origin of the more obscure terms in [2]?
I presume things like simulfix and duplifix come from a more descriptive
tradition as I've not come across them in theoretical morphology /
morphological theory discussions.

[1] https://en.wikipedia.org/wiki/Reduplication
[2] https://en.wikipedia.org/wiki/Affix

James
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