How to extract the properties of another infoblock in an infoblock?

Question

1C-Bitrix

The infoblock has a list of some parameters that you need to select when adding elements of another infoblock, I choose the binding to the elements, but only the elements themselves can be selected there.

Answer 1

The infoblock contains a list of some parameters that you need to select when adding elements of another infoblock

- the brain is broken, describe the task in more detail.

Answer 2

No way. It is impossible to pull out a property from another infoblock using standard types of fields when creating an element of another.
Write your own field types for such tasks.
Alternatively, you can use "Binding to element", while you will save the ID of the selected element. And when displaying on the pages of the site, use this link to get specific values ​​from the linked element.