Hi Richard,
Thanks for reaching out! I’m afraid that we don’t support OData import for bringing in events at this time. However, if you’re able to export from Altru to CSV format, this file format can be used to import events, venues, organizers, or tickets (if the Event Tickets plugin is installed on your site). Perhaps this might be an acceptable compromise depending on your needs?
If you’re interested in seeing OData import functionality brought to our product line, you might consider submitting a feature request to our UserVoice forum–we’d love to begin a conversation with you there!
Thanks, and let us know if you should have any other questions!