'Show Package Contents' in new iWork (Yosemite) File Formats
I've managed to expand the file by using the system (or any other) archive utility.
Here's how I got into the file:
- Make a copy of the
.key,.pages, or.numbersdocument - Change the file extension to
.zip - Unarchive as you would any other
.zipfile to produce a folder - This folder is similar to previous show package contents bundle representations of older file versions
- Make the changes you need to the document's data — in my case, this was modifying a few picture files that were used as icons throughout the multi-slide presentation
- Re-compress the folder
- Change the resultant zip file's extension to
.keyor.pagesor.numbers