OmniOutliner integration

It would be great if there was some integration for use with OmniOutliner. It is a hassle to convert from OPML back and forth

Thank you for the suggestion! DEVONthink should at least be able to index, search & display OmniOutliner files but for editing “Open Externally” or “Data > Open With…” are recommended. What exactly are you exchanging between DEVONthink & OmniOutliner via OPML?