This information is available here: http://www.eurexchange.com/marketaccess/marketmodel/trade_types2.html It is also covered in detail in the Trading Rules and Regulations manual which is required reading to pass the Eurex exam. If you need more details on where that is, I can provide those as well (it is such boring reading that it will knock you out - that's why I don't recommend it even as sh*tter reading material )
thx futures, appreciate the info, i guess i probably searched for "block trades" rather than "crossed" so these details did not come up.