Philipp Blum is right. Breadcrumbs are a nice visual feature in search engines result pages, but they are not directly related to GoodRelations. GoodRelations covers the commercial aspects of products like offer description, price specification, validity duration, but also product reviews. You may find more information about breadcrumbs at
http://support.google.com/webmasters/bin/answer.py?hl=en&answer=185417
On Tuesday, August 14, 2012 8:36:21 PM UTC+2, maich wrote: