I've been searching on the Progress website and forums, but can't find any new syntex, keywords or improvement to the core ABL languague. That seems a bit odd to me; so I just thought I'd ask.
Has the language been improved in OpenEdge 12.0?
We have a new OpenEdge Information Hub where you can find that informaiton. Please check it out: https://docs.progress.com.
In the meantime, here is a link to the New in OpenEdge 12.0 content. You'll find what you're looking for in there.