Property Transfer Query - Property Expansion Rather Than Transfer?

Hi,

 

I've noticed this a couple of times before and I always meant to query it - but I kept forgetting.

 

Say I have a POST that is the second step in my test which is sourcing a unique value from the 1st POST's RawRequest - I can either hit the 'Transfer From' or the 'Get Data' context menu.

 

A 'Transfer From Property' form is generated (if I select 'Transfer From' rather than 'Get Data' context menu) and there is a checkbox entitled 'Create Property-Expansion:' with an additional label 'Creates property-expansion syntax instead of transfer' - I don't know what this means or the differences between property expansion and transfer.

 

see the following image for the form I'm talking about:

 

 

 Can anyone clarify what this checkbox actually does and how it impacts the property transfer/expansion please?

 

This might be so obvious I just can't see it so a stupid question - I've googled it without any luck - I've played around with it - but I can't identify what it actually does and how expansion differs from transfer.

 

Can anyone clarify?

 

As always - thanks to all!

 

Cheers!

 

rich