Sure. Here’s a OmniOutliner iOS document – one of the built-in templates that I modified (changed “Topic” to “Name” and added a “Text” column):
I synced that down to the desktop via OmniPresence sync, then opened it in OO5 on MacOS. I selected all columns and exported to OPML, which I then dragged into Tinderbox 7 with this result:
Pretty slick.