How to boot to a sparse bundle

[Irl]

Is there a way to boot to a sparse bundle (which is not on its own partition)? I recently migrated to El Cap, saving my previous Mavericks bootable partition to a sparse bundle. I want to back boot to Mavericks because there is some calendar data that didn't migrate over. So:
• Is there a way to boot back to a sparsebundle?
• Is there a way to run an app on the sparse bundle and have it use data from the bundle, not from / ?

[dnanian]

No. You can't boot from a 'virtual' disk like a bundle until it's restored. And you can't somehow use the bundle as a 'virtual root', either...you'll need to restore to a drive.