> 
> This leads to three follow-up questions.
> 
> First, is there software to translate/normalize existing vendor lists from
> vendors that have not yet adopted either of these standards into these
> formats? I'm thinking of a collection of adapters or converters, perhaps.
> Each would likely constitute small effort, but there would be benefits from
> sharing development and maintenance.

Not that I'm aware of, but if I understand you then this is one of the tasks GoKB is undertaking in partnership with KB+ (the work I mentioned using Refine)

> 
> Second, if holdings lists were provided in, or converted to, for instance
> the KBART format, what software understands these formats to further
> process them? In other words, is there immediate bang for the buck of
> adopting these standards?

The KBART format was aimed at Link Resolver population - so I'd hope there was some immediate payback on this front, but I don't have any information on this

> 
> Third, unsurprisingly, these efforts arose in the managements of serials
> because holdings there change frequently depending on purchase agreements,
> etc. It is my understanding that eBooks are now posing similar collection
> management challenges. Are there separate normative efforts for eBooks or
> is it believed that efforts such as KBART/ONIX can encompass eBooks as well?
> 

KBART definitely has ambitions to encompass eBooks as well. There are already some hooks for this (e.g. 'first author' field), and the working group is looking at how ebooks will work I think

> - Godmar