What are Container Properties used for?

I'm not sure I understand what Container Properties are used for, could anyone help me out with that? Thanks!

They are properties that every item in a container must have. If you think items as "rows", then container properties are "columns".

See http://vaadin.com/book/-/page/datamodel.html. Those "PID":s in Container refer to container property ids.

Gotcha, thanks. It might help for that to be explicit somewhere in the docs, unless I missed it :)

I'll add that functionality to the JCR Container then...