Open packaging conventions

Game Definition (o8g) and Set Definition (o8s) are packaged using Open Packaging Convention (OPC). This is a standard format, you can find more information about it by using Google.

OPC Basics

An OPC file is in fact a ZIP file in disguise. You can open it and see its content with any ZIP software. Starting with Windows XP, you can even see its contents inside Explorer, provided you change its extension to .zip.

TODO: can someone continue with the way relationships work, and maybe something about the [Content_Types].xml file? Do not write specifics about o8g and o8s files, since they have their own page on this wiki