I've begun the process of mapping our feature structures onto the GOLD ontology, using the @dcr:datcat and @dcr:valueDatcat attributes in TEI, based on unique identifiers from the ISOCat.org version of GOLD 2010. Here I'll gather together a list of concepts which are difficult to map or for which no obvious terms appear in GOLD; based on this, we'll contact the GOLD maintainers for advice.

• Our concept of "linking-element" seems to have no clear equivalent. This is a bound morpheme which appears between two base morphemes simply for the purpose of joining them. An analogy in Russian would be the "o" on балто-славянская. The example in our case is xml:id="aɬ", described as "compounding element; appears between two stems in a compound word".
• GOLD seems to have no term for "loanword". This is difficult to believe, so I'm still searching for likely possibilities.