CodeGeneration: linkedAttribute - IsAggregation

[juraj]

I'm trying to prepare CodeGeneration template for our frameWork (written in c#). We have different implementation of LinkedAttribute (I observed that that’s the right point/template to put reference to some collection in class definition - that's how default template do that).
We use different property implementation of "basic reference" and aggregation.

How can I find out whether it's Aggregation, Composition or basic reference?

I found connectorSourceAggregation field subst. macro, but it's not available in LinkedAttribute section.

I am not sure if I clearly understand how CodeGeneration works, and how different „templates“ are called. Can I store some information to variable, and use it in another template?

Is there any detailed tutorial or manual for CodeGeneration templates? (For example I don't get what Stereotype Overrides does)