Keynote Automation

Creating a library of slides

We create a lot of presentations using Keynote that contain slides that are duplicated throughout the different presentations. So each time we create a new presentation we sometimes have to recreate or find/copy slides that we have used in past presentations. 

Is there some way to create a library of slides so that new presentations can link to these slides instead of having to reproduce them each time? 

We would like to do this for two reasons. 

The first reason is to prevent having to update the same slide in multiple presentations. The second reason is to help in updating. 

If we want to update a slide we would like to do it once in the library and then all the presentations that link to that slide would use the updated version.