(By Jakob Lesage): "A lexeme is reduplicated if its root is fully or partially repeated. The word class of the outcome of the process is not relevant, as long as the root is not a noun or a verb. Reduplication of function words counts, as does reduplication of numerals, adjectives and adverbs. Full repetition of already inflected words or units larger than a root does not trigger a 1 for this feature. This feature only targets productive reduplication. Lexicalized examples are irrelevant. For open word classes, this means that reduplication should not be limited to a small set of lexically determined roots. For closed word classes, any transparent reduplication counts as long as the non-reduplicated root is also still used. Roots that only occur in their reduplicated form should be considered lexicalized reduplications."
"Lexemes" are always based on roots in the Grammaticon, and roots are either noun roots, verb roots, or adjective roots. Thus, "function words" (=clitics) cannot exhibit "root repetition", but reduplication is possible for clitics, too.