Information of preceding document at runtime

Hi there,

I want to get the information of a custom field of my preceding document at runtime in order to move it to the follow up document.

At the moment I am totally lost where to finde this information. My breakpoint is in the getter class of my z-attribute in the follow-up document. Once I am there I do not finde my way to the previous doc information.

Any hint will be helpful.

Or is there a way to enhance the copy controle?

Best regards

Thea