Final answer:
The fate of attributes and relations from a report asset type depends on the system in use, but they are typically stored or archived and not automatically converted to complex relationships or global attributes.
Step-by-step explanation:
When dealing with a report asset type, what happens to all the attributes and relations that were part of it is dependent on the specific system or platform you are using. However, a common practice in many systems is that once a report is no longer in use, its attributes and relations are usually stored or archived rather than deleted. This ensures that there is a record of the data and the data structure that was used for the report, which can be beneficial for compliance, historical analysis, or for reproducing the report at a later date. It's unlikely that they are automatically assigned to a complex relationship or become global attributes without specific configuration that dictates this behavior.