Parent-Child Virtual Types
Virtual Types can be nested, which enables you to think of them in a hierarchical manner. This nesting is beneficial if you use several Virtual Types that should share some information.
For example, say you use Picturepark to publish job listings, news items, and partner listings. Each Virtual Type is different, but there are a few pieces of information you want to make sure are included wherever the information is published:
Copyright Notice
Impressum Link
You add these values to "Company Publishing" Virtual Type, and when you create children, they have fields for a copyright notice and Impressum link always available. The default values included in the "Company Publishing" Virtual Type would then be included automatically with all other Virtual Types created in Picturepark.